C and objective-C
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C is a procedural programming language developed in the 1970s that uses free-format source code, while Objective-C adds object-oriented capabilities like classes and messaging to C. Objective-C keeps all aspects of C and adds syntax and semantics for object-oriented programming, allowing problems to be divided into subclasses and modules that can be developed independently. Objective-C also enables method delegation between objects and runtime changes to classes.
C and objective-C
- 2. C is a type of computer programming language. C was originally developed by Dennis Ritchie at AT&T Bell Labs between 1969 and 1973. It has a free-format program source code. Objective-C is a general-purpose, high-level, object-oriented programming language. It adds Smalltalk-style messaging to the C programming language. As it is a superset of C, everything that is valid C is also valid in Objective-C.
- 3. ● Objective C keeps all aspects of C ● Objective C adds syntax and semantics that allows for object oriented programming. ● Objective C is object oriented programming whereas, C is procedural programming. ● Objective C incorporates classes, whereas as C doesn’t. ● Objective C allows for division of problems subproblems and submodules that can be developed and tested individually. ● Objective C allows for delegating methods to other objects and remote invocation, which can be easily implemented using categories and message forwarding. ● Objective C allows for swizzling of the isa pointer that allows for classes to change at runtime. ● Objective C, like Java, does not support multiple inheritance ● Objective C allows the user to define a protocol by declaring an Objective C class. ● Objective C does allow instance variables (data members) to be set as public, private, or protected.