View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main()
{
    int a,b,c;
    double s;
    scanf("%d%d%d",&a,&b,&c);
    s=sqrt((a+b+c)*(a+b-c)*(a+c-b)*(b+c-a))/4;
    printf("%.2lf",s);
    return 0;
}