View Code of Problem 24

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	double S,p;
	while(scanf("%d%d%d",&a,&b,&c)!=EOF){
		p = (a+b+c)/2.0;
		S = sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2lf",S);
		cout<<endl;
	}
	return 0;
}