写两层类的银行账号管理系统c++代码

以下是一个简单的银行账号管理系统的C++代码，包含两个类：BankAccount和Bank。BankAccount类表示单个银行账户，Bank类表示整个银行的管理系统。

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

using namespace std;

class BankAccount {
private:
    string name;
    int accountNumber;
    double balance;

public:
    BankAccount(string n, int num, double bal) {
        name = n;
        accountNumber = num;
        balance = bal;
    }

    string getName() {
        return name;
    }

    int getAccountNumber() {
        return accountNumber;
    }

    double getBalance() {
        return balance;
    }

    void deposit(double amount) {
        balance += amount;
    }

    void withdraw(double amount) {
        if (balance >= amount) {
            balance -= amount;
        } else {
            cout << "Insufficient balance!" << endl;
        }
    }

    void display() {
        cout << "Name: " << name << endl;
        cout << "Account Number: " << accountNumber << endl;
        cout << "Balance: " << balance << endl;
    }
};

class Bank {
private:
    vector<BankAccount> accounts;

public:
    void addAccount(string name, int accountNumber, double balance) {
        BankAccount account(name, accountNumber, balance);
        accounts.push_back(account);
    }

    void removeAccount(int accountNumber) {
        for (int i = 0; i < accounts.size(); i++) {
            if (accounts[i].getAccountNumber() == accountNumber) {
                accounts.erase(accounts.begin() + i);
                cout << "Account removed." << endl;
                return;
            }
        }
        cout << "Account not found." << endl;
    }

    void displayAll() {
        for (int i = 0; i < accounts.size(); i++) {
            accounts[i].display();
            cout << endl;
        }
    }

    BankAccount* findAccount(int accountNumber) {
        for (int i = 0; i < accounts.size(); i++) {
            if (accounts[i].getAccountNumber() == accountNumber) {
                return &accounts[i];
            }
        }
        return NULL;
    }
};

int main() {
    Bank bank;

    bank.addAccount("Alice", 1001, 1000);
    bank.addAccount("Bob", 1002, 2000);
    bank.addAccount("Charlie", 1003, 3000);

    bank.displayAll();

    BankAccount* account = bank.findAccount(1002);
    if (account != NULL) {
        account->deposit(500);
        account->display();
    }

    bank.removeAccount(1003);

    bank.displayAll();

    return 0;
}

在该代码中，BankAccount类包含了银行账户的基本信息和操作方法。Bank类则包含了整个银行账户的管理系统，包括添加、删除和查找账户等方法。在main函数中，我们可以看到如何使用这两个类来管理银行账户。