View Code of Problem 24

#include<bits/stdc++.h>
using namespace std;
int main(){
	double sum = 0,p;
	int a,c,b;
	while(cin>>a>>b>>c){
		p = ( a + b + c ) * 1.0 / 2;
		sum = sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2lf\n",sum);	
	}
	return 0;
}