ejecutar un programa con su contraseña a la vez

#include <iostream>
#include <string>
int main()
{
    std::cout << "Please enter your password: ";
    std::string password;
    std::getline(std::cin, password);
    if (password == "1234")
    {
        std::cout << "You have now access to the system.\n";
    }
    else
    {
        std::cout << "Access denied.\n";
    }
    return 0;
}