View Code of Problem 24

#include<bits/stdc++.h>
using namespace std;

int main() {

	double a,b,c;
	while(cin>>a>>b>>c){
		double p=(a+b+c)/2;
		double s=sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2lf\n",s);
		
	}

	return 0;
}