#include <iostream>
#include <sstream>
#include <ncurses.h>

using namespace std;

int stringtonumber(string mystring)
{
    // Convert from string to number
    istringstream converter(mystring);
    // Contains the operation result
    int result;

    // Perform the conversion and return the result
    converter >> result;
    return result;
}

string enter_only_numbers()
{
    string num_as_string = ""; // Holds numeric string

    // init curses:
    initscr();

    char ch = getch(); // Obtains numeric string

    // Keep requesting characters until user presses Enter
    while (ch != '\r')
    {
        // \r is the Enter key
        // Add characters only they are numbers
        if (ch >= '0' && ch <= '9')
        {
            cout << ch;
            num_as_string += ch;
        }

        // Get the next character from an user
        ch = getch();
    }
    // end curses:
    endwin();
    return num_as_string;
}

string enter_password()
{
    // Holds the password string
    string num_as_string = "";

    // init curses:
    initscr();

    // Obtain single character from an user
    char ch = getch();

    // Keep requesting characters until user presses Enter
    while (ch != '\r')
    {
        cout << '*';
        num_as_string += ch;
        ch = getch();
    }
    // end curses:
    endwin();

    return num_as_string;
}

int main()
{

    string name;
    cout << "What are your name?" << endl;
    cin >> name;
    cout << "Hello " << name << endl;

    int x;
    cout << endl;
    cout << "Enter a number, any number!";
    cin >> x;
    cout << "You chose " << x << endl;

    cout << endl;
    cout << "This time enter only a number!" << endl;
    cout << "Enter a number, any number!";
    string entered = enter_only_numbers();
    int num = stringtonumber(entered);
    cout << endl << "You entered " << num << endl;

    cout << endl;
    cout << "Enter your password: ";
    string password = enter_password();
    cout << endl << "Shhhh, its " << password << endl;

    return 0;
}