View Code of Problem 24

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