#include <iostream>

enum class MachineState {
    Startup,
    Ready,
    PendigPayment,
    Release,
    Unlock,
    Shutdown
};

// SIMULATING HARDWARE-REQUESTS

int main() {

    MachineState state = MachineState::Startup;
    
    state = MachineState::Ready;
    while(true) {
        std::string input;

        switch (state) {
            case MachineState::Ready: {
                std::cout << "Pick a number" << std::endl;
                std::getline(std::cin, input);
                std::cout << "Coast: 15€" << std::endl;
                
                state = MachineState::PendigPayment;
                break;
            }
            case MachineState::PendigPayment: {


                break;
            }

        }
    }
    return 0;
}