View Code of Problem 24

#include<stdio.h>
#include<math.h>
int main()
{
	float S,a,b,c;
	while(scanf("%f %f %f",&a,&b,&c)!=EOF)
	{ 
		if(a>0&&b>0&&c>0&&a+b>c&&a+c>b&&b+c>a)
		{
			S=0.5*b*c*pow((1-pow((b*b+c*c-a*a)/(2*b*c),2)),0.5);
			printf("%.2f\n",S);
		}
	}
}