View Code of Problem 24

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