Circle Area Calculator

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

int main()
{
    cout << "Circle Area Calculator (cm2)" << endl;
    cout << "****************************" << endl;
    cout << "" << endl;
    system("pause");

    double diameterInput;

    cout << "Input the diameter of your circle: ";
    cin >> diameterInput;
    system("pause");
    system("cls");

    double diameterAfterPI = diameterInput * 3.1415926536;

    cout << "The Area of the circle is:   " << diameterAfterPI << "  (cm2)" << endl;


    return 0;
}