View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main()
{
	double s;
	int a,b,c;
	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;
}