View Code of Problem 24

#include <stdio.h>
#include <math.h>
int main()
{
	int a,b,c;
	while(scanf("%d %d %d",&a,&b,&c) != EOF){
		double p;
		p = (double)(a + b + c)/2;
		double s;
		s = sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2f\n",s);
	}
	return 0;
}