View Code of Problem 24

#include <iostream>
#include <cstdio>
#include <iomanip>
#include <cmath>
using namespace std;
int main(){
    int a,b,c;
    double s,p;
    while(cin>>a>>b>>c){
    p=(a+b+c)/2.0;
    s=sqrt(p*(p-a)*(p-b)*(p-c));
    cout<<fixed<<setprecision(2)<<s<<endl;
    }
    return 0;
}