View Code of Problem 24

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