View Code of Problem 24

#include <stdio.h>
#include <math.h>

int main(void)
{
	int a,b,c;
	float p,s;
	
	while (scanf("%d %d %d", &a, &b, &c) != EOF)
	{
		p = (a+b+c) / 2.0;
		s = sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2f\n", s);		
	}
			
	return 0;
}