Program Mesin ATM Dalam C++

#include <cstdlib>
#include <iostream>
#include <conio.h>

using namespace std;

class ATM{
      public: ATM();
              void input();
              bool proses();
              void output();
      private: int pin;
      };

ATM :: ATM(){
 cout<<"================SELAMAT DATANG DI BANK BRI================="<<endl;
 cout<<endl<<endl;
}

void ATM::input(){
     cout<<"Masukan PIN anda : ";cin>>pin;
}

bool ATM::proses(){   
     if (pin != 1400018211){
        return false;}
     else{
        return true;}
}

void ATM::output(){
     cout<<"Pilih Menu Transaksi :"<<endl;
     cout<<"1.Tarik Tunai"<<endl;
     cout<<"2.Transfer"<<endl;
     cout<<"3.Pembayaran"<<endl;
     cout<<"4.Info Saldo"<<endl;
     cout<<"5.Lain-lain\n"<<endl;
}


int main(int argc, char *argv[])
{ 
    ATM go;
    for (int i=1;i<=3;i++){
        go.input();
        if (go.proses()==true){
           go.output();
           break;
        }
  else if( (go.proses()==false) and (i==3)){
           cout<<"Maaf, anda sudah salah memasukkan PIN 3 kali ATM anda terblokir sementara"<<endl;
           break;
        }
  else
           cout<<"Pin yang anda masukan salah, silakan coba lagi"<<endl<<endl;
    }
  
    system("PAUSE");
    return EXIT_SUCCESS;

}


                                                 Jika Password ATM Benar

                                                 Jika Password ATM Salah