View Code of Problem 24

#include <stdio.h>
#include <math.h> 
int main()
{
	double a,b,c;
	double 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("%.2lf\n", s);		
	}
	return 0;
}