My first C++ Program *^* (Just a basic calculator)

#include <iostream>
#include <stdio.h>
#include <windows.h>

using namespace std;

int main()
{
    cout << "==============\nC++ CALCULATOR\n==============" << endl;

    //Input first number
    cout << "\n\nChoose the first number (use \".\" for decimals): " << endl;
    double firstNumber;
    cin >> firstNumber;

    //Input second number
    cout << "\nNow choose the second number (use \".\" for decimals): " << endl;
    double secondNumber;
    cin >> secondNumber;

    //Input operation
    cout << "\nChoose your operation ( +, -, * or / )" << endl;
    char operation;
    cin >> operation;

    //Case switch for operations
    switch(operation){
    case '+':
        {
            cout << "\nThe result is: " << firstNumber + secondNumber << endl;
            break;
        }
    case '-':
        {
            cout << "\nThe result is: " << firstNumber - secondNumber << endl;
            break;
        }
    case '*':
        {
            cout << "\nThe result is: " << firstNumber * secondNumber << endl;
            break;
        }
    case '/':
        {
            cout << "\nThe result is: " << firstNumber / secondNumber << endl;
            break;
        }
    }

    cout << "\n\n--------------------------\nDeveloped by Wolfiy\n" << "\nPress [ENTER] to leave.\n\n" <<endl;
    getchar();
    return 0;
}