View Code of Problem 24

#include <stdio.h>
#include <math.h>
int main()
{
	int a,b,c,n;
	float l,S;
	scanf("%d",&n);
	while(n--){
		scanf("%d %d %d",&a,&b,&c);
		l=(a+b+c)/2.0;
		S=sqrt(l*(l-a)*(l-b)*(l-c));
		printf("%.2f\n",S);
	}
	return 0;
}