View Code of Problem 24

#include <stdio.h>
#include <math.h>
int main()
{
	int a,b,c;
	double p,s; 
	while(scanf("%d %d %d",&a,&b,&c)!=EOF)
	{
		p=1.0*(a+b+c)/2;
		s=sqrt(p*(p-a)*(p-b)*(p-c));
        printf("%.2lf\n",s);
	}
}