View Code of Problem 24

#include <stdio.h>
#include <string.h>
#include <math.h>
#define N 100
int main()
{
	int a, b, c;
	float p, s;
	scanf("%d %d %d", &a, &b, &c);
	p = (float)0.5*(a + b + c);
	s = sqrt(p * (p - a) * (p - b) * (p - c));
	printf("%.2f",s);
}