c++多态继承写一个可以开户的银行管理系统

好的，我可以为您提供一个基于多态继承的银行管理系统示例，它可以用于开户、存款、取款、查询余额等操作。

首先，我们需要定义一个基类BankAccount，它包含一些通用属性和方法，如账户号、账户名、账户余额，以及存款、取款、查询余额等操作。然后，我们可以创建两个派生类CheckingAccount和SavingsAccount，用于处理不同类型的银行账户。

以下是一个简单的示例代码，其中包含了基类和两个派生类的定义和实现：

#include <iostream>
#include <string>
using namespace std;

class BankAccount {
protected:
    string accountNumber;
    string accountName;
    double balance;
public:
    BankAccount(string accountNumber, string accountName, double balance) {
        this->accountNumber = accountNumber;
        this->accountName = accountName;
        this->balance = balance;
    }
    virtual void display() {
        cout << "Account Number: " << accountNumber << endl;
        cout << "Account Name: " << accountName << endl;
        cout << "Account Balance: " << balance << endl;
    }
    virtual bool deposit(double amount) {
        balance += amount;
        return true;
    }
    virtual bool withdraw(double amount) {
        if (balance >= amount) {
            balance -= amount;
            return true;
        }
        else {
            return false;
        }
    }
};

class CheckingAccount : public BankAccount {
private:
    double overdraftLimit;
public:
    CheckingAccount(string accountNumber, string accountName, double balance, double overdraftLimit)
        : BankAccount(accountNumber, accountName, balance) {
        this->overdraftLimit = overdraftLimit;
    }
    void display() {
        BankAccount::display();
        cout << "Overdraft Limit: " << overdraftLimit << endl;
    }
    bool withdraw(double amount) {
        if (balance + overdraftLimit >= amount) {
            balance -= amount;
            return true;
        }
        else {
            return false;
        }
    }
};

class SavingsAccount : public BankAccount {
private:
    double interestRate;
public:
    SavingsAccount(string accountNumber, string accountName, double balance, double interestRate)
        : BankAccount(accountNumber, accountName, balance) {
        this->interestRate = interestRate;
    }
    void display() {
        BankAccount::display();
        cout << "Interest Rate: " << interestRate << endl;
    }
    void addInterest() {
        balance += balance * interestRate;
    }
};

int main() {
    BankAccount* accountList[10];
    int numAccounts = 0;
    int choice;

    do {
        cout << "Bank Account Management System" << endl;
        cout << "1. Open a Checking Account" << endl;
        cout << "2. Open a Savings Account" << endl;
        cout << "3. Deposit Money" << endl;
        cout << "4. Withdraw Money" << endl;
        cout << "5. Display Account Information" << endl;
        cout << "6. Exit" << endl;
        cout << "Enter your choice: ";
        cin >> choice;

        switch (choice) {
        case 1:
            string accountNumber, accountName;
            double balance, overdraftLimit;
            cout << "Enter Account Number: ";
            cin >> accountNumber;
            cout << "Enter Account Name: ";
            cin >> accountName;
            cout << "Enter Opening Balance: ";
            cin >> balance;
            cout << "Enter Overdraft Limit: ";
            cin >> overdraftLimit;
            accountList[numAccounts] = new CheckingAccount(accountNumber, accountName, balance, overdraftLimit);
            numAccounts++;
            break;
        case 2:
            string accountNumber1, accountName1;
            double balance1, interestRate;
            cout << "Enter Account Number: ";
            cin >> accountNumber1;
            cout << "Enter Account Name: ";
            cin >> accountName1;
            cout << "Enter Opening Balance: ";
            cin >> balance1;
            cout << "Enter Interest Rate: ";
            cin >> interestRate;
            accountList[numAccounts] = new SavingsAccount(accountNumber1, accountName1, balance1, interestRate);
            numAccounts++;
            break;
        case 3:
            string accountNumber2;
            double amount;
            cout << "Enter Account Number: ";
            cin >> accountNumber2;
            cout << "Enter Deposit Amount: ";
            cin >> amount;
            for (int i = 0; i < numAccounts; i++) {
                if (accountList[i]->accountNumber == accountNumber2) {
                    accountList[i]->deposit(amount);
                    cout << "Deposit Successful!" << endl;
                    break;
                }
            }
            break;
        case 4:
            string accountNumber3;
            double amount1;
            cout << "Enter Account Number: ";
            cin >> accountNumber3;
            cout << "Enter Withdrawal Amount: ";
            cin >> amount1;
            for (int i = 0; i < numAccounts; i++) {
                if (accountList[i]->accountNumber == accountNumber3) {
                    if (accountList[i]->withdraw(amount1)) {
                        cout << "Withdrawal Successful!" << endl;
                    }
                    else {
                        cout << "Insufficient Balance!" << endl;
                    }
                    break;
                }
            }
            break;
        case 5:
            string accountNumber4;
            cout << "Enter Account Number: ";
            cin >> accountNumber4;
            for (int i = 0; i < numAccounts; i++) {
                if (accountList[i]->accountNumber == accountNumber4) {
                    accountList[i]->display();
                    break;
                }
            }
            break;
        case 6:
            cout << "Thank you for using Bank Account Management System!" << endl;
            break;
        default:
            cout << "Invalid Choice!" << endl;
        }
    } while (choice != 6);

    return 0;
}

在这个示例中，我们定义了一个包含10个银行账户指针的数组accountList，以及一个变量numAccounts，用于跟踪当前数组中的银行账户数。在主函数中，我们使用一个菜单来允许用户选择不同的操作，例如开户、存款、取款、查询余额等操作。

当用户选择开户操作时，我们会提示用户输入账户号、账户名、开户金额以及特定于账户类型的其他属性，例如overdraftLimit或interestRate。然后，我们将创建一个新的CheckingAccount或SavingsAccount对象，并将其加入到accountList数组中。

当用户选择存款或取款操作时，我们会提示用户输入账户号和金额，并遍历accountList数组以查找匹配的账户。如果找到了匹配的账户，我们将调用其deposit或withdraw方法来执行相应的操作。

当用户选择查询余额操作时，我们会提示用户输入账户号，并遍历accountList数组以查找匹配的账户。如果找到了匹配的账户，我们将调用其display方法来显示账户信息。

当用户选择退出操作时，我们将退出程序。

这就是一个简单的基于多态继承的银行管理系统示例，希望能对您有所帮助。