Class BankAccountCommand

Behavioral/Command/command_undo.cpp:40–79

};

struct BankAccountCommand : Command
{
  BankAccount& account;
  enum Action { deposit, withdraw } action;
  int amount;

  BankAccountCommand(BankAccount &account, Action action, int amount) : account(account), action(action),
                                                                        amount(amount) {
    succeeded = false;
  }

  void call() override {
    switch (action)
    {
      case deposit:
        account.deposit(amount);
        succeeded = true;
        break;
      case withdraw:
        succeeded = account.withdraw(amount);
        break;
    }
  }

  void undo() override {
    if (!succeeded) return;

    switch (action)
    {
      case deposit:
        account.withdraw(amount);
        break;
      case withdraw:
        account.deposit(amount);
        break;
    }
  }


};

int main()
{