View Code of Problem 24

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