View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main()
{
	int a,b,c,d;
	double sum;
	while(scanf("%d %d %d",&a,&b,&c)!=EOF)
	{
		sum=0;
		d=(a+b+c)/2.0;
		sum=sqrt(d*(d-a)*(d-b)*(d-c));
		printf("%.2lf\n",sum);
	}
}