第三次 上机及小测.zip

#include <stdio.h> #include <math.h> int main(){ float a,b,c,t,s,p; printf("Enter a b c:"); scanf("%f %f %f",&a,&b,&c); if(a>b){ t=b; b=a; a=t; } if(a>c){ t=c; c=a; a=t; } if(b>c){ t=c; c=b; b=t; } if(a+b>c){ p=(a+b+c)/2; s=sqrt(p*(p-a)*(p-b)*(p-c)); if(a==b&&b==c) printf("length of sides:%f %f %f\ns:%f\nequilaterals.",a,b,c,s); else if(a==b||b==c){ if(a*a+b*b==c*c) printf("length of sides:%f,%f,%f\ns:%f\nisosceles and right.",a,b,c,s); else printf("length of sides:%f,%f,%f\ns:%f\nisosceles.",a,b,c,s); } else if(a*a+b*b==c*c) printf("length of sides:%f,%f,%f\ns:%f\nright.",a,b,c,s); else printf("length of sides:%f,%f,%f\ns:%f\ngeneral.",a,b,c,s); } else printf("Error"); return 0; }