View Code of Problem 24

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