View Code of Problem 24

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