View Code of Problem 24

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