View Code of Problem 24

#include<iostream>
#include<math.h>
using namespace std;
int main(){
	int a,b,c;
	double p,s;
	while(cin>>a>>b>>c){
		p=(a+b+c)/2.0;
//		cout<<p<<endl;
		s=sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2f\n",s);
		
	}
	
	return 0;
}