View Code of Problem 24

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

int main ()
{
	int a, b, c;
	scanf ("%d%d%d", &a, &b, &c);
	
	double l = (a + b + c) / 2.0;
	printf ("%.2f\n", sqrt(l * (l -a) * (l - b) * (l - c)));
	return 0;
}