View Code of Problem 24

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

int main(void)
{
	int a,b,c;
	float s,p;

	scanf("%d %d %d", &a, &b, &c);

	p = (a+b+c)/2.0;

	s = sqrt(p*(p-a)*(p-b)*(p-c));		

	printf("%.2f", s);

	return 0;
}