View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main()
{

    int a,b,c;
    double s;
    while(scanf("%d%d%d",&a,&b,&c)!=EOF)
    {
        s=sqrt((a+b+c)*(a+b-c)*(a+c-b)*(b+c-a))/4;
        printf("%.2lf\n",s);
    }
     return 0;
}