View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main()
{
	float a,b,c,k=0,s=0;
	while(scanf("%f %f %f",&a,&b,&c)!=EOF)
	{
		k=(a+b+c)/2.0;
		s=sqrt(k*(k-a)*(k-b)*(k-c));
		printf("%.2f",s);
	}
	return 0;
}