View Code of Problem 24

#include <stdio.h>
#include <math.h>
int main(){
  int a,b,c;
  float s,temp;
  while(scanf("%d%d%d",&a,&b,&c)!= EOF){
    temp = (a+b+c)/2.0;
    s= sqrt(temp*(temp-a)*(temp-b)*(temp-c));
    printf("%.2f\n",s);
  }

return 0;
}