用C++写一个包含存取款，计算利息和信用卡功能银行管理系统

好的，下面是一个包含存取款、计算利息和信用卡功能的银行管理系统的C++代码示例：

#include <iostream>
#include <string>
#include <vector>

using namespace std;

class Account {
public:
    Account(string name, int accountNumber, double balance)
        : m_name(name), m_accountNumber(accountNumber), m_balance(balance) {}

    void deposit(double amount) { m_balance += amount; }
    void withdraw(double amount) { m_balance -= amount; }

    string getName() const { return m_name; }
    int getAccountNumber() const { return m_accountNumber; }
    double getBalance() const { return m_balance; }

protected:
    string m_name;
    int m_accountNumber;
    double m_balance;
};

class SavingsAccount : public Account {
public:
    SavingsAccount(string name, int accountNumber, double balance, double interestRate)
        : Account(name, accountNumber, balance), m_interestRate(interestRate) {}

    double calculateInterest() const { return m_balance * m_interestRate; }

protected:
    double m_interestRate;
};

class CreditCard : public Account {
public:
    CreditCard(string name, int accountNumber, double balance, double creditLimit, double interestRate)
        : Account(name, accountNumber, balance), m_creditLimit(creditLimit), m_interestRate(interestRate) {}

    void makePayment(double amount) {
        if (amount > m_balance) {
            cout << "Invalid payment amount. Cannot pay more than current balance." << endl;
        } else {
            m_balance -= amount;
        }
    }

    void charge(double amount) {
        if (m_balance + amount > m_creditLimit) {
            cout << "Charge declined. Credit limit exceeded." << endl;
        } else {
            m_balance += amount;
        }
    }

    double calculateInterest() const { return m_balance * m_interestRate; }

protected:
    double m_creditLimit;
    double m_interestRate;
};

class Bank {
public:
    void addAccount(Account* account) { m_accounts.push_back(account); }
    void removeAccount(int accountNumber) {
        for (int i = 0; i < m_accounts.size(); i++) {
            if (m_accounts[i]->getAccountNumber() == accountNumber) {
                m_accounts.erase(m_accounts.begin() + i);
                break;
            }
        }
    }

    Account* findAccount(int accountNumber) {
        for (int i = 0; i < m_accounts.size(); i++) {
            if (m_accounts[i]->getAccountNumber() == accountNumber) {
                return m_accounts[i];
            }
        }

        return nullptr;
    }

private:
    vector<Account*> m_accounts;
};

int main() {
    Bank bank;

    // Add some accounts
    Account* aliceAccount = new SavingsAccount("Alice", 1234, 1000.0, 0.05);
    bank.addAccount(aliceAccount);

    Account* bobAccount = new CreditCard("Bob", 5678, 2000.0, 5000.0, 0.10);
    bank.addAccount(bobAccount);

    // Find an account by account number
    Account* account = bank.findAccount(1234);
    if (account) {
        cout << account->getName() << "'s account balance is " << account->getBalance() << endl;

        SavingsAccount* savingsAccount = dynamic_cast<SavingsAccount*>(account);
        if (savingsAccount) {
            cout << "The interest earned on Alice's savings account is " << savingsAccount->calculateInterest() << endl;
        }
    }

    // Make a deposit
    account->deposit(500.0);
    cout << account->getName() << "'s account balance after deposit is " << account->getBalance() << endl;

    // Make a withdrawal
    account->withdraw(200.0);
    cout << account->getName() << "'s account balance after withdrawal is " << account->getBalance() << endl;

    // Charge the credit card
    account = bank.findAccount(5678);
    if (account) {
        CreditCard* creditCard = dynamic_cast<CreditCard*>(account);
        if (creditCard) {
            creditCard->charge(1000.0);
            cout << account->getName() << "'s credit card balance after charge is " << account->getBalance() << endl;
            cout << "The interest charged on Bob's credit card is " << creditCard->calculateInterest() << endl;
        }
    }

    // Make a payment on the credit card
    account->makePayment(500.0);
    cout << account->getName() << "'s credit card balance after payment is " << account->getBalance() << endl;

    // Remove an account
    bank.removeAccount(1234);

    // Clean up memory
    delete aliceAccount;
    delete bobAccount;

    return 0;
}

这个代码示例创建了 `Account` 类，作为其他具体账户类型的基类。它还创建了 `SavingsAccount` 类和 `CreditCard` 类，分别表示储蓄账户和信用卡账户。这些类都继承自 `Account` 类，并实现了计算利息、存取款和信用卡功能的方法。

在 `main()` 函数中，我们首先创建了一个储蓄账户和一个信用卡账户，并使用 `addAccount()` 方法将它们添加到银行中。然后，我们使用 `findAccount()` 方法查找一个特定账户，并显示其余额和利息。接着，我们对账户进行了存取款、信用卡充值和付款等操作，最后使用 `removeAccount()` 方法删除了一个账户。

值得注意的是，由于我们使用了指针来存储账户对象，所以需要在程序结束前手动释放内存。