Lab manual of C++

Lab Manual CS 161 Introduction to Computer Programming C++

SECOND EDITION

Lab Manual CS 161
Introduction to Computer
Programming C++
By Saqib Rasheed

2012-2013

Department of Computer Science
Air University

Air University, PAF Complex, E-9, Islamabad Science
Air University
1
Department of Computer


Student Name
Student Roll #
Department
Batch / Year

Note: At the end of this lab manual there is a Lab evaluation summary sheet. It is
the responsibility of every student to get that sheet signed from his/her lab engineer
after every lab. If He / She fail to do so, that particular unsigned lab will be marked zero.

To suggest more improvements and correction please feel free to write to thesaqib@yahoo.com
Copyright © 2015, 2007, All rights reserved. Manufactured in Pakistan. Except as permitted
under the Pakistan States Copyright Act of 1971, no part of this publication may be reproduced
or distributed in any form or by any means, or stored in a database or retrieval system, without
the prior written permission of the writer. (saqib.rasheed@mail.au.edu.pk)

Air University Department of Computer Science
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Contents
INTRODUCTION......................................................................................................................... 9
Lab Manual # 1 ........................................................................................................................... 11
Basic ............................................................................................................................................. 11
1.1 A typical C++ environment ................................................................................................ 12
1.2 Program No 1 ...................................................................................................................... 13
1.2.1 Out Put of Program No 1 ............................................................................................. 13
1.3 Declare Variables ................................................................................................................ 13
1.4 Program No 2 Example Of Assignment Operator .............................................................. 13
1.5 Arithmetic Operators .......................................................................................................... 14
1.5.1 Precedence ................................................................................................................... 14
1.6 Program No 3 ...................................................................................................................... 15
1.6.1 Code of Program No 3 ................................................................................................. 15
1.7 Program No 4 ...................................................................................................................... 16
1.8 Program No 5 ...................................................................................................................... 16
1.9 Program No 6 ...................................................................................................................... 18
Lab Manual # 2 ........................................................................................................................... 19
if / if-else Statements ................................................................................................................... 19
2.1 Que No 1 Largest value among three ................................................................................. 20
2.1.1 Code Area .................................................................................................................... 20
2.2 Que No 2 Grade Program using nested if else .................................................................... 21
2.3 Que No 3 vowel / Consonant .............................................................................................. 22
2.3.1 Code ............................................................................................................................. 22
2.4 Que No 4 Even / Odd .......................................................................................................... 23
2.4.1 Code Area .................................................................................................................... 23
2.5 Que No 5 Capital / Small Letter ......................................................................................... 24
2.5.1 Code Area .................................................................................................................... 24
2.6 Que No 6 Ice / water / steam .............................................................................................. 25
2.6.1 Code Area .................................................................................................................... 25

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Lab Manual # 3 ........................................................................................................................... 26
Switch Statement ......................................................................................................................... 26
3.1 Que No 1 Switch statement................................................................................................. 27
3.1.1 Code Area .................................................................................................................... 27
Lab Manual # 4 ........................................................................................................................... 30
For/while Loops ...................................................................................................................... 30
4.1 Example .............................................................................................................................. 31
4.1.1 Output .......................................................................................................................... 31
4.2 Example Of While Loop ..................................................................................................... 31
4.2.1 Output .......................................................................................................................... 31
4.3 Flow chart of while Loop .................................................................................................... 32
4.4 Factorial Definition ............................................................................................................. 32
4.4.1 Code of Factorial Program ........................................................................................... 32
4.5 For loop ............................................................................................................................... 33
4.5.1 Example of for loop ..................................................................................................... 33
4.5.2 Write the output of the program step by step .............................................................. 33
4.5.3 Final Output ................................................................................................................. 33
4.6 Flow Chart of Table 2 ......................................................................................................... 34
4.6.1 Write a program for the above flow chart ........................................................................ 34
4.7 Example .............................................................................................................................. 35
4.8 QUE NO 1 Terminate program on entering zero ......................................................... 35
4.8.1 Code ............................................................................................................................. 35
4.9 QUE NO 2 Factorial program .......................................................................................... 36
4.9.1 Code ................................................................................................................................. 36
4.10 QUE NO 3 Fibonacci series........................................................................................... 37
4.10.1 Code ........................................................................................................................... 37
4.11 Que No 4 . Armstrong number....................................................................................... 38
4.11.1 Code ........................................................................................................................... 38
4.12 QUE NO 5 Largest among user defined numbers ..................................................... 39
4.12.1 Code ........................................................................................................................... 39
4.13 Nested loops Table 12 *12 .............................................................................................. 40
4.13.1 Code ........................................................................................................................... 40
4.14 Series using nested loops .................................................................................................. 41
4.14.1 Code for Series 1 ........................................................................................................ 41

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4.14.2 Code for series 2 ........................................................................................................ 42
4.14.3 Code for series 3 ........................................................................................................ 43
Lab Manual # 5 ........................................................................................................................... 44
Do-while loop ............................................................................................................................... 44
5.1 do-while loop syntax ........................................................................................................... 45
5.1.1 Flow Chart of do-while loop ............................................................................................ 45
5.2 QUE 1 Calculate the sum of user defined numbers...................................................... 46
5.2.1 Code ............................................................................................................................. 46
5.3 QUE NO 2 Calculate factorial of user defined numbers ............................................. 47
5.3.1 Code ............................................................................................................................. 47
5.4 Que 3 Calculator ................................................................................................................ 48
5.4.1 Code ............................................................................................................................. 48
Lab Manual # 6 ........................................................................................................................... 49
Function ....................................................................................................................................... 49
6.1 Built In Function ................................................................................................................. 50
6.1.1 Out Put ......................................................................................................................... 50
6.2 Write types of Function ...................................................................................................... 50
6.3 Write Syntax Of function (Prototype, call & body of function) ......................................... 50
6.4 Que No 1 square () functioin .............................................................................................. 51
6.4.1 Code ............................................................................................................................. 51
6.5 Que No 2 Finding average using function .......................................................................... 52
6.5.1 Code ............................................................................................................................. 52
6.6 Que No 3 ............................................................................................................................. 53
6.7 Que No 4 finding area of rectangle ..................................................................................... 54
6.7.1 Code ............................................................................................................................. 54
6.8 Que No 5 Check date program............................................................................................ 55
6.8.1 Code ............................................................................................................................. 55
6.9 Que No 6 Leap Year program ............................................................................................. 56
6.9.1 code .............................................................................................................................. 56
6.10 Que No 7 Finding largest using if else in function ........................................................... 57
6.10.1Code ............................................................................................................................ 57
6.11 QueNo 8 ............................................................................................................................ 58
6.11.1 Code ........................................................................................................................... 58
6.12 Comparison of functions ................................................................................................... 59

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6.13 Que No 9 Swap by using function .................................................................................... 59
6.13.1 Code ........................................................................................................................... 59
6.14 Provide an Example of Functions Overloading ................................................................ 60
6.15 Que 10 Find Factorial from -1 to 10 using function ........................................................ 61
Lab Manual # 7 ........................................................................................................................... 62
1-D Arrays / Strings .................................................................................................................... 62
7.1 Introduction ......................................................................................................................... 63
7.2 Que No 1 Displaying age of persons using array ............................................................... 63
7.2.1 Code ............................................................................................................................. 63
7.3 Que No 2 Changing values between arrays ........................................................................ 64
7.3.1Code .............................................................................................................................. 64
7.4 Que No 3 ............................................................................................................................. 65
7.4.1 Code ............................................................................................................................. 65
7.5 Que No 4 ............................................................................................................................. 66
7.5.1 Code ............................................................................................................................. 66
7.6 Que No 5 ............................................................................................................................. 67
7.6.1 Code ............................................................................................................................. 67
7.7 Que No 6 ............................................................................................................................. 68
7.7.1Code .............................................................................................................................. 68
7.8 Que No7 .............................................................................................................................. 69
7.8.1 Code ............................................................................................................................. 69
7. 9 Que No 8 ............................................................................................................................ 70
7.10 Strings ............................................................................................................................... 71
7.10.1 Example of Strings ..................................................................................................... 71
7.10.2 Que No 9 Get the name from user ............................................................................. 72
7.11 The String I/O Function gets() & puts() ........................................................................... 72
7.12 The String I/O Function gets() & puts() ........................................................................... 72
7.13 strcpy & strcmp ................................................................................................................. 73
7.13.1 strcpy & strcmp example ........................................................................................... 73
7.14 Que No 9 String Deletion ................................................................................................. 74
Lab Manual # 8 ........................................................................................................................... 75
2-D Arrays ................................................................................................................................... 75
8.1 Que No 1 Shows sale of Pharmaceutical distribution company ......................................... 76
8.1.1Code .............................................................................................................................. 76

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8.2 Que no 2 Adding two matrices ........................................................................................... 77
8.2.1 Code ............................................................................................................................. 77
8.4 Que no 3 Printing matrix in reserve. ................................................................................... 78
8.4.1 Code ............................................................................................................................. 78
8.5 Que no 4 Transpose of a Matrix ......................................................................................... 79
8.5.1Code .............................................................................................................................. 79
8.6 Que no 5 Agent Program .................................................................................................... 80
8.6.1 Code ............................................................................................................................. 80
Lab Manual # 9 ........................................................................................................................... 81
Structures..................................................................................................................................... 81
9.1 Introduction ......................................................................................................................... 82
9.2 Structure Example............................................................................................................... 82
9.2.1 Output .......................................................................................................................... 82
9.2.2 Description ................................................................................................................... 83
9.3 Que No 1 Area of rooms ..................................................................................................... 84
9.3.1 Code ............................................................................................................................. 84
9.4 Que No 2 Phone Number Program ..................................................................................... 85
9.4.1 Code ............................................................................................................................. 85
9.5 Que No 3 Employee record................................................................................................. 86
9.5.1 Code ............................................................................................................................. 86
9.5 Que No 4 Memory size of a structure ................................................................................. 87
9.5.1 Code ............................................................................................................................. 87
9.6 Que No 5 Average Age Program ........................................................................................ 88
9.6.1 Code ............................................................................................................................. 88
9.7 Que No 6 Nested Structure ................................................................................................. 89
9.7.1 Code ............................................................................................................................. 89
9.8 Que No 7 Access of structure data members with pointer to structure .............................. 90
Lab Manual # 10 ......................................................................................................................... 91
Pointers ........................................................................................................................................ 91
10.1 Introduction to Pointers......................................................................................................... 92
10.1.1 Example of Pointers ................................................................................................... 92
10.2 Pointer To Arrays .................................................................................................................. 92
10.2 Que No 1 Print the values from array ............................................................................... 93
10.3 Que No 2 Print the values and memory address from an array ........................................ 93

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10.4 Pointer Arithmetic............................................................................................................. 94
10.4.1 Example of Pointer arithmetic ................................................................................... 94
10.4.2 Output ........................................................................................................................ 94
10.5 Que No 3 Accessing values by Arithmetic operator ......................................................... 95
10.5.1 Code ........................................................................................................................... 95
10.6 Que No 4 Moving in array through pointers ..................................................................... 96
10.6.1 Code ........................................................................................................................... 96
10.7 Pointer Comparison .......................................................................................................... 96
10.7.1 Pointer Comparison Example .................................................................................... 97
10.8 Que No 4 Question Max ................................................................................................... 97
10.8.1 Code ........................................................................................................................... 97
10.9 Pointer to functions ........................................................................................................... 98
10.9.1 Que No 5 Swap the same values using pointers. .......................................................... 98
10.10 Que No 6 Returning more than one values from a function ........................................... 99
10.10.1 Code ......................................................................................................................... 99
Lab Manual # 11 ....................................................................................................................... 100
Files............................................................................................................................................. 100
11.1 Introduction to Files ........................................................................................................ 101
11.2 Files of C ......................................................................................................................... 101
11.3 Files in C++ .................................................................................................................... 102
11.3.1 Open a file .................................................................................................................... 102
11.4 Que No 1 Create a text file ............................................................................................. 103
11.4.1 Code ......................................................................................................................... 103
11.5 Que No 2 Read from the file ........................................................................................... 104
11.5.1 Code ......................................................................................................................... 104
11.6 Que No 3 Write data through variable ........................................................................... 105
11.6.1 code .......................................................................................................................... 105
11.7 String with Embedded blanks ......................................................................................... 106
11.7.1 Code ......................................................................................................................... 106
Lab Evaluation Summary .................................................................................................... 107

8

Introduction

INTRODUCTION
The objective of this lab manual is to give students step-by-step examples to become
familiar with programming concepts, design, and coding.

F E AT U R E S
To ensure a successful experience for instructors and students alike, these lab munals
includes the following features:

 Lab Objectives—Every lab has a brief description and list of learning
objectives
 Materials Required—Every lab includes information on hardware, software, and
other materials you will need to complete the lab
 Completion Times—Every lab has an estimated completion time so that you
can plan your activities more accurately
 Activity Sections—Labs are presented in manageable sections; where
appropriate, additional Activity Background information is provided to illustrate
the importance of a particular project
 Step-by-Step Instructions—Every lab provides steps to enhance technical
proficiency; some labs include Critical Thinking exercises to challenge students
 Review Questions—Some labs include review questions to help reinforce
concepts presented in the lab

SOFTWA R E REQUIREMENTS

 Computer running Windows 98,Windows Me,Windows 2000, Windows XP
 Recommended compiler is Microsoft Visual C++ .NET or Microsoft Visual Studio

COMPLETING THE LAB ASSIGNMENTS

Some lab assignments require written answers to complete an exercise, while others
are programming assignments that require you to work with a C++ compiler.

 Check with your instructor for instructions on completing the written
assignments. For example, you can print pages directly from the appropriate
PDF file, and then write directly on the page.

 To complete the programming assignments, use the compiler that your instructor
recommends or requires. Print all the documentation assigned, including
program code, program prompts, input, and output displayed on the screen, input
files, and output files.You can submit your written answers and the printed
documentation with a lab cover sheet for grading. If your instructor requires an
electronic copy of your work, e-mail the completed assignment to your instructor
or include a removable disk with your work.Your instructor will tell you what is

9

Introduction

needed, but be sure to submit the .cpp, .h, and any .srt or .txt files that you
create, as well as any input and output files. Also include your name or ID in the
titles of all your files. To provide program documentation, compile and run your
program, copy the prompts, input, and output (if appropriate), and paste them as
a block comment at the end of your program. Use the Copy and Paste features
of your C++ program development kit to do so. After you paste the comment
in the program, either print the program file from your text editor or submit the
program file to your instructor electronically.

10

Lab Manual # 1 Basic

Lab Manual # 1
Basic

11


1.1 A typical C++ environment

Program is created in the
Editor Disk editor and stored on disk.
Preprocessor program
Preprocessor Disk
processes the code.
Compiler creates object
Compiler Disk code and stores it on disk.
Linker links the object
Linker Disk code with the libraries
Primary Memory
Loader

Loader puts program
Disk in memory.

Primary Memory
CP CPU takes each
U instruction and
executes it, possibly
storing new data
values as the program

12


1.2 Program No 1
#include <iostream.h>
main ( )
{
cout << ― Welcome to Air University ―;
}

1.2.1 Out Put of Program No 1

1.3 Declare Variables
Declare 3 Integer Type & 3 float type Variables.

INT Float

1.4 Program No 2 Example Of Assignment Operator
#include <iostream>
using namespace std;
int main ()
{
int a, b;
a = 10;
b = 4;
a = b;
b = 7;
cout << "a :";
cout << a;
cout << " b :";
cout << b;
return 0;
}

13



1.5 Arithmetic Operators
Write Arithmetic Operators

1.5.1 Precedence
Write precedence of the arithmetic operators

14


1.6 Program No 3
Write a program in C++ that display following output

***** *****
***** *****
***** *****
***** *****
***** *****
***** *****
***** *****
***** *****
***** *****
***** *****
***** *****
###############################
###############################
###############################

1.6.1 Code of Program No 3

15


1.7 Program No 4
Write a programin C++ which prints following output,

$*********************************************$
$*********************************************$
$* Welcome to Air University *$
$* School of Engineering *$
$* lsamabad. *$
$**********************************************$
$**********************************************$


1.8 Program No 5
Write a program in C++, which takes radius from the user and calculate the area of
sphere i.e
Area=4pr2

(Hint p = 3.1416
Area = 4 * 3.1416 * r * r)

16




17


1.9 Program No 6
Write a program to find the number of bytes occupied by various data types using the
sizeof operator?

int a;
char b;
float c;
long int d;
bool e;
unsigned int j;
unsigned long k;

1.9.1Code

18

Lab Manual # 2 if/if-else statements

Lab Manual # 2
if / if-else Statements

19


2.1 Que No 1 Largest value among three

Write a program in C++ that take input of three integer‘s numbers from user. Find the
largest number among three of them.

2.1.1 Code Area

20


2.2 Que No 2 Grade Program using nested if else

Write a program in C++ using if/else operator with nested statements to find the grade
of a student.
The detail is as follow.

grade >= 90  Grade A
grade >= 80  Grade B
grade >=70  Grade C
grade >=60  Grade D

2.2.1 Code Area

21


2.3 Que No 3 vowel / Consonant

Write a program in C++ to input a single character and print a message― It is
vowel" if it is vowel otherwise print message "It is a "consonant― Use if-else structure
and OR (||) operator only

2.3.1 Code

22


2.4 Que No 4 Even / Odd
Write a Program in C++ that take an Integer Value from the user and tell that the
number is EVEN or ODD.

2.4.1 Code Area

23


2.5 Que No 5 Capital / Small Letter
Write a program in C++ that take a single character from the user, and tells it's a Small
Letter or it's a CAPITAL letter using nested if statement only.

2.5.1 Code Area

24


2.6 Que No 6 Ice / water / steam
Make a program in C ++ that tells the form of Water whether it is Ice, Water or
Steam. Display the menu also as under.

Temperature Less than 0 = ICE
Temperature Greater than 0 & Less than 100 = Water
Temperature Greater than 100 = STEAM

2.6.1 Code Area

25

Lab Manual # 3 Switch Statements

Lab Manual # 3
Switch Statement

26


3.1 Que No 1 Switch statement

Write a program in C++ using switch statement that contain option as under

Enter 1--> To Find Largest Number Among Three Variables.
Enter 2--> To Find ODD or EVEN
Enter 3--> To Find Condition of Water
Enter 4--> To Find Grade Of Student

Detail of Option 3
Temperature Less than 0 = ICE
Temperature Greater than 0 & Less than 100 = Water
Temperature Greater than 100 = STEAM

Detail of option 4
grade >= 90  Grade A
grade >= 80  Grade B
grade >=70  Grade C
grade >=60  Grade D

3.1.1 Code Area

27


28


29

Lab Manual # 4 For / While loop

Lab Manual # 4
For/while Loops

30


4.1 Example

int sum ;
sum = 1+2+3+4+5+……..+10 ;
cout << sum ;

4.1.1 Output

4.2 Example Of While Loop

int sum , number ;
sum = 0 ;
number = 1 ;
while ( number <= 1000 )
{
sum = sum + number ;
number = number + 1 ;
}
cout << ― The sum of the first 1000 integer starting from 1 is ‖ << sum ;

4.2.1 Output

31


4.3 Flow chart of while Loop

4.4 Factorial Definition

n! = n*(n-1)*(n-2)*(n-3)…………*3*2*1 Out Put

4.4.1 Code of Factorial Program
int number ;
int factorial ;
factorial = 1 ;

cout << ―Enter the number of Factorial‖ ;
cin >> number ;
while ( number >= 1 )
{
factorial = factorial * number ;
number = number – 1 ;
}
cout << ―Factorial is‖ << factorial ;

32


4.5 For loop
for ( initialization condition ; termination condition ; increment condition )
{
statement ( s ) ;
}

4.5.1 Example of for loop

int counter ;
for( counter = 0 ; counter < 10 ; counter = counter + 1 )
cout << counter;

4.5.2 Write the output of the program step by step

4.5.3 Final Output

33


4.6 Flow Chart of Table 2

4.6.1 Write a program for the above flow chart

34


4.7 Example
Write a Program That Display numbers from
1,2,3,4,5,6,7.8.9………………..10000

4.7.1 Code

4.8 QUE NO 1 Terminate program on entering zero
Write a Program in C++ that Exit on entering 0, Using While Loop.

4.8.1 Code

35


4.9 QUE NO 2 Factorial program
Write a Program in C++ that calculate the factorial of a user defined number, using for
loop

4.9.1 Code

36


4.10 QUE NO 3 Fibonacci series
Write a Program in C++ that shows The Fibonacci series
1 1 2 3 5 8 13 ….. Using wile loop

4.10.1 Code

37


4.11 Que No 4 . Armstrong number
Write a Program in C++ that check the user defined number is Armstrong or not.i.e 153
is an Armstrong number

(1)3 + (5) 3 + (3)3
1 + 125 + 27 = 153

4.11.1 Code

38


4.12 QUE NO 5 Largest among user defined numbers
Write a Program in C++ that takes Integer values from user, and then find the largest
number among all the Integers, and display the largest number on the screen. Use
While loop to control the Input, Terminate the Program on entering zero. Find the
Largest Integer Using If Statement.

4.12.1 Code

39


4.13 Nested loops Table 12 *12
Write a program in C++ that prints a tables
Starting from 1 12. i.e

1 2 3 4 5 6 7 8 9 10 11 12
2 4 6 8 10 12 14 16 18 20 22 24
3 6 9 12 15 18 21 24 27 30 33 36
4 8 12 16 20 24 28 32 36 40 44 48
5 10 15 20 25 30 35 40 45 50 55 60
6 12 18 24 30 36 42 48 54 60 66 72
7 14 21 28 35 42 49 56 63 70 77 84
8 16 24 32 40 48 56 64 72 80 88 96
9 18 27 36 45 54 63 72 81 90 99 108
10 20 30 40 50 60 70 80 90 100 110 120
11 22 33 44 55 66 77 88 99 110 121 132
12 24 36 48 60 72 84 96 108 120 132 144
4.13.1 Code

40


4.14 Series using nested loops
Develop a code in C++ that generate the following series .Use
nested while loop!

Series No.1 Series No.2 Series No.3

1 1 1
12 22 23
123 333 456
1234 4444 7 8 9 10

4.14.1 Code for Series 1

41


4.14.2 Code for series 2

42


4.14.3 Code for series 3

43

Lab Manual # 5 do-while loop

Lab Manual # 5
Do-while loop

44


5.1 do-while loop syntax

do
{
statements ;
}
while ( condition ) ;

5.1.1 Flow Chart of do-while loop

45


5.2 QUE 1 Calculate the sum of user defined numbers

Develop a program in C++ that take integer type values from user & calculate the sum
from ‗0‘ to number entered, using do while loop.
Number = 5

1+2+3+4+5 = 15
5.2.1 Code

46


5.3 QUE NO 2 Calculate factorial of user defined numbers
Develop a program in C++ that calculate the factorial of a given number. Use for loop to
calculate the factorial, & do – while loop to perform the operation as many times as user
want.

5.3.1 Code

47


5.4 Que 3 Calculator
Create the equivalent of a four-function calculator. The program should Ask the user to
enter a number, an operator, and another number (10 + 20), using floating point.It
should then carry out the specified arithmetical operation: adding, subtracting,
multiplying, or dividing the two numbers. Use switch statement to select the operation.
Finally, display the Result.

5.4.1 Code

48

Lab Manual # 6 Functions

Lab Manual # 6
Function

49


6.1 Built In Function
#include <cmath> // defines the sqrt() function
#include <iostream.h>

int main()
{ // tests the sqrt() function:
for (int x=0; x <=9; x++)
cout << "t" << x << "t" << sqrt(x) << endl;
}

6.1.1 Out Put

6.2 Write types of Function

6.3 Write Syntax Of function (Prototype, call & body of function)

50


6.4 Que No 1 square () functioin
Write a program in C++ that has a function of square (). The user should enter
the number and the code should display the square of the given number .

6.4.1 Code

51


6.5 Que No 2 Finding average using function
Get three integers numbers from user, Pass them to function, Add them and find the
average in function body, Display the Average in function body

6.5.1 Code

52


6.6 Que No 3
Write a code that take numbers from user and displays its cube. The Code
should reads integers and prints their cubes until the user inputs the sentinel
value 0. Each integer read should be passed to the cube() function by the call
cube(n). The value returned by the function should replaces the expression
cube(n) and then should be passed to the output object cout.

6.6.1 Code

53


6.7 Que No 4 finding area of rectangle
Write a function that finds the area of the rectangle on providing length and width.
Get Length & width from user in main() Call the function area() Calculate the
length and return the area Display the result in main()

6.7.1 Code

54


6.8 Que No 5 Check date program
Get month ,day & year from user in main() Call the function printDate(int, int, int), Put a
check in printDate() using if statement (month < 1 || month > 12 || day < 1 || day > 31 ||
year < 0) & if it violates the rule display ―Must Enter a Valid Date”, Using switch
Statement get the month, Day and year are displayed normally, Termination should be
on entering 0 in months

6.8.1 Code

55


6.9 Que No 6 Leap Year program
A leap year is a year in which one extra day (February 29) is added to the regular
calendar. Most of us know that the leap years are the years that are divisible by 4. For
example, 1992 and 1996 are leap years. Most people, however, do not know that there
is an exception to this rule: centennial years are not leap years. For example, 1800
and 1900 are not leap years. Furthermore, there is an exception to the exception:
centennial years which are divisible by 400 are leap years. Thus, the year 2000 is a
leap year.
 Make a program that full fills the above criteria using functions
 The program should terminate on entering 0
 The return type should be Boolean i.e bool isLeapYear(int);

6.9.1 code

56


6.10 Que No 7 Finding largest using if else in function
Write a program in C++ that take two numbers from user and find the largest
among two using function.
 The Conditions are
if (a==b)
"A, B are the same“ a = b, (values)
else if (a < b)
"A & B are not same “ a != b (values)
" A is less than B “ a < b (values)
else
"A is Greater than B “ a > b (values)

6.10.1Code

57


6.11 QueNo 8
Develop a program in C++ that has function printTempOpinion() which prints "Cold" on
if the temperature is below 10, "OK" if the temperature is in the range 20 -> 30,"Hot" if
the temperature is above 30.

6.11.1 Code

58


6.12 Comparison of functions
Difference between Passing By Value Versus Passing By Reference

By Value By Reference

6.13 Que No 9 Swap by using function
Develop a program that swap the two values using function by reference
i.e After swap
a = 22.2 a = 44.4
b = 44.4 b = 22.2

6.13.1 Code

59


6.14 Provide an Example of Functions Overloading

60


6.15 Que 10 Find Factorial from -1 to 10 using function

61

Lab Manual # 7 1-Dimensional Array / Strings

Lab Manual # 7
1-D Arrays / Strings

62


7.1 Introduction
They are special kind of data type In C++ each array has
 name
 data type
 size
 They occupy continuous area of memory

7.2 Que No 1 Displaying age of persons using array
Write a program in C++ that take age of five persons and then just display the age of
each person by using arrays.

7.2.1 Code

63


7.3 Que No 2 Changing values between arrays
Develop a Program that takes array elements from user and then transfer those
elements to another array. Size of array will be 10

7.3.1Code

64


7.4 Que No 3
Develop a program that takes 5 array elements from user. Swap position [2] element
with position [4] element.

7.4.1 Code

65


7.5 Que No 4
Write a program to input data into two different arrays and then to add the two arrays
and store the result in the third array.

7.5.1 Code

66


7.6 Que No 5
Write a program in C++, to input data into an array. Enter a value from the Keyboard
and find out the location of the entered value in the array. If the entered number is found
in the array, display the message "Number Found―else display ―Number Not Found‖

7.6.1 Code

67


7.7 Que No 6
Write a program that takes input from user and checks if the word is Palindrome or Not

7.7.1Code

68


7.8 Que No7
Find the Average of 10 numbers passed to an array, using function. The Array should
be controlled by while loop.

7.8.1 Code

69


7. 9 Que No 8
Write a Program in C++ that do the bubble sorting in Array.
Hint
 Array Elements are entered by user in ―main function‖, the elements
are user Defined. Terminate on “zero”
 Make a separate function “sort()” to do the bubble sort.
 Pass array elements to function “sort()”.
 Function should sort the array elements.
 Display the sorted array elements in main.

7.9.1 Code

70


7.10 Strings
A string constant is a one-dimensional array of characters terminated by a null ( ‗0‘ ).
For example,
char name[ ] = { 'H', 'A', 'E', 'S', 'L', 'E', 'R', '0' } ;

7.10.1 Example of Strings

/* Program to demonstrate printing of a string */
main( )
{
char name[ ] = "Klinsman" ;
int i = 0 ;
while ( i <= 7 )
{
cout<<name[i];
i++ ;
}
}

/* Program to demonstrate printing of a string */
main( )
{
char name[ ] = "Klinsman" ;
int i = 0 ;
while (name[i] !=‘0‘)
{
cout<<name[i];
i++ ;
}
}

71


7.10.2 Que No 9 Get the name from user
Write a program that gets the name from user and then print back on the screen.

7.11 The String I/O Function gets() & puts()
cin & cout are not so versatile because they ignore charters after white space, so
to over come this problem C/C++ uses puts & gets function from library file
<stdio.h>

7.12 The String I/O Function gets() & puts()
Write a program that gets the name from user and then print back on the screen using
gets and puts functions.

72


7.13 strcpy & strcmp

7.13.1 strcpy & strcmp example

73


7.14 Que No 9 String Deletion
Write a program in C++ that take string from user and then enter the position to delete.
Make a separate function for string deletion

74

Lab Manual # 8 2-Dimensional Array

Lab Manual # 8
2-D Arrays

75


8.1 Que No 1 Shows sale of Pharmaceutical distribution company
A Distributor of a Pharmaceutical Company has 4 Districts, for supply the medicine. He
requires a program that can display the sales of all his Districts. Write a Program in C++
Using two Dimensional Array that shows the Following Output. The Program should
display the Sale, Districts wise and up to Months i.e

8.1.1Code

76


8.2 Que no 2 Adding two matrices
Write a program in C++ that take two matrices and then Add them After inserting two
matrices first display the both matrices and then add them and show the result. i.e

8.2.1 Code

77


8.4 Que no 3 Printing matrix in reserve.
Enter the values in a matrix and print it in reverse Column order

8.4.1 Code

78


8.5 Que no 4 Transpose of a Matrix
Write a Program in C++ that Display the Transpose of a Matrix.

8.5.1Code

79


8.6 Que no 5 Agent Program
Write a program in C++, which take Agent code (123,258,..) and Traveling expense
(Rs = 5000, 6000,…) of the agent. Find the agent who had spent most money in all,
Display the agent code and amount after searching in 2 D Array.

8.6.1 Code

80

Lab Manual # 9 Structures

Lab Manual # 9
Structures

81


9.1 Introduction
 A Structure is a collection of simple variables. The Variables in a structure can be
of different types. Some can be int, some can be float, and so on.
 The data items in a structure are called the members of the structure.
 The structure is a kind of blue print specifying what information is necessary for a
single part.

9.2 Structure Example
struct part
{
int modelnumber;
int partnumber;
float cost;
};
int main ()
{
part part1, part2;
part1.modelnumber = 1111;
part1.partnumber = 111;
part1.cost = 111.11;

part2.modelnumber = 222;
part2.partnumber = 2222;
part2.cost = 222.222;
cout<<"nModel of Part1 = "<<part1.modelnumber;
cout<<"nPart of part 1 = "<<part1.partnumber;
cout<<"nCost of part1 = "<<part1.cost<<endl;

cout<<"nModel of part2 = "<<part2.modelnumber;
cout<<"nPart of part2 = "<<part2.partnumber;
cout<<"nCost of part2 = "<<part2.cost<<endl;
return 0;
}

9.2.1 Output

Model of Part1 = 1111
Part of part 1 = 111
Cost of part1 = 111.11
Model of part2 = 222
Part of part2 = 2222
Cost of part2 = 222.222

82


9.2.2 Description
The structure definition serves only as a blueprint for the creation of variables of type
part. It does not itself create any structure variables; that is, it does not set aside any
space in memory or even name any variables. This is unlike the definition of a simple
variable, which does set aside memory.

83


9.3 Que No 1 Area of rooms
Write a program in C++ that shows the area of 3 room's. Using Structure namely
"distance". Take input of feet & inches from user for variable d1 (feet & inches), assign
variable d2 = {10, 5.25} values. Now add feet and inches of d1 & d2 and store in d3.
Display d1 (feet & inches) d2 (feet & inches) d3 (feet & inches) separately. Put
Condition if d1 & d2 inches increase by 12 it become a foot.

9.3.1 Code

84


9.4 Que No 2 Phone Number Program
A phone number, such as 212- 767-8900, can be thought of as having three parts: the
area code (212), the exchange (767), and the number (8900). Write a program that
uses a structure to store these three parts of a phone number separately. Call the
structure phone. Create two structures variables of type phone. Initialize one, and have
the user input a number for the other one. Then display both numbers. The interchange
might look like this:

9.4.1 Code

85


9.5 Que No 3 Employee record
Create a structure called emp that contains three members,
int id, char name[100], float sal.
Ask the user to fill in data for three employees and then display information for
each employee.
Hint
 Variable of struct emp will be array
 Use while / for loop to control array

9.5.1 Code

86


9.5 Que No 4 Memory size of a structure
Write a program using ―sizeof()‖ function that calculate the size of structure

9.5.1 Code

87


9.6 Que No 5 Average Age Program
Write a program to calculates the average age and average GPA of a class having 10
students. Also determine the grade of the class and the student with max GPA. Use a
student structure and manipulate it to get the desired result.

9.6.1 Code

88


9.7 Que No 6 Nested Structure
Write a program that contains nested structure

9.7.1 Code

89


9.8 Que No 7 Access of structure data members with pointer to structure

90

Lab Manual # 10 Pointers

Lab Manual # 10
Pointers

91


10.1 Introduction to Pointers
int *myptr ;
myptr is pointer to an integer

10.1.1 Example of Pointers
#include<iostream.h>
void main ()
{
int var1 = 10;
int var2 = 20;
int var3 = 30;
cout<<&var1<<endl
<<&var2<<endl;
int *ptr;
ptr = &var1;
cout<<ptr<<endl;
ptr = &var2;
cout<<ptr<<endl;
}

10.2 Pointer To Arrays
void main ()
{
int array[5] = {31,54,77,52,93};
for(int j =0; j<5; j++)
{
cout<<array[j]<<endl;

}
}
void main ()
{
int array[5] = {31,54,77,52,93};
int* ptr;
ptr = array;
for(int j =0; j<5; j++)
{
cout<<*(ptr++)<<endl;
}
}

92


10.2 Que No 1 Print the values from array
Write a program that prints the values from an array using pointer variable. The array is
given below
int y [ 10 ]= {6,2,3,12};

10.3 Que No 2 Print the values and memory address from an array
Write a program that prints the values from an array using pointer variable. The array is
given below
int y [ 10 ]= {6,2,3,12};

93


10.4 Pointer Arithmetic
int x =10 ;
int *yptr ;
yptr = &x ;
*yptr += 3 ;
yptr += 3 ;

10.4.1 Example of Pointer arithmetic

long* pnumber = NULL;
long number1 = 10, number2 = 20;

pnumber = &number1;
*pnumber += 2;

cout<<"nnumber1 = "<<number1
<<" &number = "<<pnumber;
pnumber = &number2;
number1 = *pnumber *4;

cout<<"nnumber1 = "<<number1
<<" pnumber = "<<pnumber
<<"pnumber = "<<*pnumber;

10.4.2 Output

number1 = 12 &number = 0x0012FF78
number1 = 80 pnumber = 0x0012FF74
pnumber = 20
Press any key to continue

94


10.5 Que No 3 Accessing values by Arithmetic operator
Write a program that displays the values using pointer variable from an array given
below using Arithmetic Increment operator .

int y[5]={22,33,44,55,66};

10.5.1 Code

95


10.6 Que No 4 Moving in array through pointers
Write a program that display only 6th element of an array given below using pointers.

int y [10] ={11,22,33, 44,55,66,77,88,99,110}

10.6.1 Code

10.7 Pointer Comparison

if ( y1 > y2 )
if ( y1 >= y2 )
if ( y1 == y2 )

if ( *y1 > *y2 )

96


10.7.1 Pointer Comparison Example

int y [10]={11,22,33,44,55,66,77,88,99,110} ;

int *y1, *y2;
y1= &y[0];
y2= &y[3];;

cout <<"n Y1= "<<*y1;
cout <<"n Y2= "<<*y2;

if (*y1 < *y2)
cout<<"nY1 is Smaller"<<endl;
else
cout<<"nY2 is smaller"<<endl;

10.8 Que No 4 Question Max
Write a program that take two numbers an input from user. Find the maximum from both
of them using the dereference pointer comparison

10.8.1 Code

97


10.9 Pointer to functions
main( )
{
int a = 10, b = 20 ;
swapv ( a, b ) ;
cout<<”na =”<<a<<” b= ”<<b;
}
swapv ( int x, int y )
{
int t ;
t=x;
x=y;
y=t;
cout<<”nx = ”<<x<<” y = ”<<y;
}

The above given code is swapping the values without pointers.

10.9.1 Que No 5 Swap the same values using pointers.

98


10.10 Que No 6 Returning more than one values from a function
Write a program that gets the radius from user, pass radius to a function areaperi() and
function areaperi() returns ―area‖ and ―perimeter‖ by reference

Using a call by reference intelligently we can make a function return more than one
value at a time, which is not possible ordinarily.

10.10.1 Code

99

Lab Manual # 11 Files

Lab Manual # 11
Files

100


11.1 Introduction to Files
File processing in C++ is very similar to ordinary interactive input and output because
the same kinds of stream objects are used. Input from a file is managed by an ifstream
object the same way that input from the keyboard is managed by the istream object cin.
Similarly, output to a file is managed by an ofstream object the same way that output to
the monitor or printer is managed by the ostream object cout. The only difference is that
ifstream and ofstream objects have to be declared explicitly and initialized with the
external name of the file which they manage. You also have to #include the <fstream>
header file (or <fstream.h> in pre-Standard C++) that defines these classes

Notice that the program has four objects: an ifstream object named infile, an ofstream
object named outfile, a string object named word, and a char object named c.
The advantage of using external files instead of command line redirection is that there is
no limit to the number of different files that you can use in the same program.

11.2 Files of C
//Program that create / open a file
#include<stdio.h>
#include<conio.h>
void main ()
{
FILE *fptr;
char ch;
fptr = fopen("first.txt","w");
while((ch =getche()) != 'r')
putc(ch,fptr);
fclose(fptr);
}

101


11.3 Files in C++
include <fstream>
using namespace std;
int main ()
{
ofstream myfile;
myfile.open ("first.txt");

myfile << "This is my first file n";
myfile.close();
return 0;
}

This Code will creates a file ―first.txt‖ and insert a sentence into it in the same way we
are used to do with cout<< but using the myfile stream instead

11.3.1 Open a file
Open (filename, mode);
 Mode is optional parameter with a combination of the following flags

ios::in Open for input operations.
ios::out Open for output operations.
ios::binary Open in binary mode. Set the initial position at the end of the file.
ios::ate If this flag is not set to any value, the initial position is the beginning of the
file.
ios::app All output operations are performed at the end of the file, appending the
content to the current content of the file. This flag can only be used in
streams open for output-only operations.
ios::trunc If the file opened for output operations already existed before, its previous
content is deleted and replaced by the new one.

All these flags can be combined using the bitwise operator OR (|). For example, if we
want to open the file example.bin in binary mode to add data we could do it by the
following call to member function open(): ofstream myfile;myfile.open ("example.bin",
ios::out | ios::app | ios::binary);

102


11.4 Que No 1 Create a text file
Write a program that create a text file ―example.txt‖. Open that file and write two line in it
―This is a line and This is another line‖ and close the file. If the file is unable to create or
open then show a message ―ERROR Unable to open a file‖.

11.4.1 Code

103


11.5 Que No 2 Read from the file
Write a program that read the text from file ―example.txt‖.
If the file is unable to open then show a message ―ERROR Unable to open a file‖.

11.5.1 Code

104


11.6 Que No 3 Write data through variable
Write a program that create a text file ―fdata.txt‖. Open that file and write the values
through variables as under. After successful writing show a message ―File written
successfully‖ .

char ch = 'x';
int j = 77;
double d = 6.02;
string str1 = "How are u? ";
string str2 = "Pretty Good";

11.6.1 code

105


11.7 String with Embedded blanks
Write a program that creates a file “test.txt” and write the following lines in that file

If we don‘t work hard,
We will not be able to score high &
might some our class fellow get flunked
repeating the semester again

Write these lines one by one in the same format given above

11.7.1 Code

106

Lab Manual Lab Evaluation Summary

Lab Evaluation Summary

Date Total Marks
Lab Lab Topics Signature
conducted Marks Obtained
#
Basic
1

If, if-else, Nested if else
2

Switch Statement
3

For loop, While loop
4

Do- while loop
5

Function
6

Arrays, Strings
7

8 Two Dimensional
Arrays
Structures
9

Pointers
10

Files
11

Total

Note: It is the responsibility of every student to get this sheet signed from his/her lab
engineer after every lab.

107

Lab manual of C++

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