View Code of Problem 24

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