Square Area Calculator

#include "stdafx.h"
#include <cstdlib>
#include <iostream>
#include <string>
using namespace std;

int main()
{
    play:
    //Declarations
    double base, height;

    //Start
    cout << "\a" << endl;
    cout << "--Square Area Calculator (cm2)--" << endl;
    cout << "*******************************" << endl;
    system("pause");
    cout << "" << endl;

    //Inputs
    cout << "Base of square: ";
    cin >> base;
    cout << "Height of square: ";
    cin >> height;
    system("pause");

    //Result declarations
    double areaResult = base * height;
    double halfArea = areaResult / 2;

    //Display results
    cout << areaResult << "cm2" << endl;
    cout << "Half of the area is " << halfArea << "cm2" << endl;
    system("pause");

    retryOption:
    //Retry declaration variable
    string retryAnswer;

    //Retry option
    cout << "Want to calculate the area of another square? y=yes n=no: ";
    cin >> retryAnswer;

    if (retryAnswer == "y")
    {
        cout << "\a" << endl;
        system("cls");
        goto play;
    }
    else if (retryAnswer == "n")
    {
        exit;
    }
    else
    {
        cout << "Invalid answer, choose y or n." << endl;
        goto retryOption;
    }

    return 0;
}