怎样用C++构建简易银行账户系统 类与对象的基础应用

BankAccount

class BankAccount {
private:
    std::string accountHolder;
    std::string accountNumber;
    double balance;

public:
    // 构造函数
    BankAccount(std::string name, std::string number, double initialBalance);

    // 成员函数
    void deposit(double amount);   // 存款
    bool withdraw(double amount);  // 取款（返回是否成功）
    void display() const;          // 显示账户信息
};

// 构造函数实现
BankAccount::BankAccount(string name, string number, double initialBalance) {
    accountHolder = name;
    accountNumber = number;
    balance = initialBalance;
}

void BankAccount::deposit(double amount) {
    if (amount > 0) {
        balance += amount;
        cout << "已成功存入：" << amount << endl;
    } else {
        cout << "存款金额必须大于0" << endl;
    }
}

bool BankAccount::withdraw(double amount) {
    if (amount > 0 && balance >= amount) {
        balance -= amount;
        cout << "已成功取出：" << amount << endl;
        return true;
    } else {
        cout << "取款失败，余额不足或金额无效" << endl;
        return false;
    }
}

void BankAccount::display() const {
    cout << "账户持有人：" << accountHolder << endl;
    cout << "账号：" << accountNumber << endl;
    cout << "当前余额：" << balance << endl;
}

int main() {
    BankAccount account("张三", "1234567890", 1000.0);

    account.display();

    account.deposit(500);
    account.withdraw(200);

    account.display();

    return 0;
}

账户持有人：张三
账号：1234567890
当前余额：1000
已成功存入：500
已成功取出：200
账户持有人：张三
账号：1234567890
当前余额：1300