Question

我正在尝试使用派生类CheckingAccount创建BankAccount类。我遇到的问题如下：

CheckingAccount应包含一个数据成员，以跟踪在该帐户上进行的提款交易的数量。每当提款时，这个数字都应该递增。
覆盖基类，取款功能，并添加从帐户中扣除交易费用的功能

BankAccount.h

class BankAccount {
private:
    /* ATTRIBUTES */
    int accountNumber;
    double balance;

public:
        /* METHODS */
    BankAccount();

    void setAccountNumber( int );
    void deposit( double );

    int getAccountNumber();
    int getBalance();

    double withdraw( double );
};

CheckingAccount.h

#include "BankAccount.h"
class CheckingAccount: public BankAccount {
private:
        /* ATTRIBUTES */
    int withdrawalAmount;
    double balance;

        /* METHODS */
public:
        /* METHODS */
    CheckingAccount();
};

CheckingAccount.cpp

#include "CheckingAccount.h"

CheckingAccount::CheckingAccount() {
//Initialize
}

double CheckingAccount::withdraw( double a ) {
    //This doesn't work.
}

Answer 1

只需在BankAccount类中进行虚拟撤销，并在CheckingAccount中声明它。

virtual double withdraw( double );

派生类C ++ BankAccount程序

1 个答案: