使用c++模拟ATM实现取款、存款、查询帐户余额(当然,ATM还有转帐修改密码等功能) 。3. 课程设计要求： (1)定义最初类: 帐户类AccoutItem:定义4各私有成员:帐户、口令、姓名和存款余额,同时定义公有成员构造函数和对象显示函数Display 及存/取函数。 (2)操作过程: ① 登陆(用户插卡),进行身份验证。 ② 用户对ATM进行取款、存款、查询帐户余额操作。 ③ 退出系统。

好的，以下是一个简单的ATM模拟程序，实现了取款、存款和查询余额功能：

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

class AccountItem {
private:
    string account;
    string password;
    string name;
    double balance;
public:
    AccountItem(string a, string p, string n, double b) {
        account = a;
        password = p;
        name = n;
        balance = b;
    }
    void display() {
        cout << "Account: " << account << endl;
        cout << "Name: " << name << endl;
        cout << "Balance: " << balance << endl;
    }
    void deposit(double amount) {
        balance += amount;
    }
    void withdraw(double amount) {
        if (balance >= amount) {
            balance -= amount;
        } else {
            cout << "Insufficient balance!" << endl;
        }
    }
    bool verify(string a, string p) {
        return account == a && password == p;
    }
};

int main() {
    AccountItem account("123456789", "password", "John", 5000.0);
    string input_account, input_password;
    cout << "Please insert your card and enter your account and password:" << endl;
    cin >> input_account >> input_password;
    if (account.verify(input_account, input_password)) {
        cout << "Login success!" << endl;
        while (true) {
            int choice;
            cout << "Please choose an operation: 1. Deposit 2. Withdraw 3. Check balance 4. Exit" << endl;
            cin >> choice;
            if (choice == 1) {
                double amount;
                cout << "Please enter the deposit amount: ";
                cin >> amount;
                account.deposit(amount);
                cout << "Deposit success!" << endl;
            } else if (choice == 2) {
                double amount;
                cout << "Please enter the withdraw amount: ";
                cin >> amount;
                account.withdraw(amount);
            } else if (choice == 3) {
                account.display();
            } else if (choice == 4) {
                cout << "Thank you for using our ATM!" << endl;
                break;
            } else {
                cout << "Invalid choice, please try again!" << endl;
            }
        }
    } else {
        cout << "Login failed, please try again!" << endl;
    }
    return 0;
}

程序中创建了一个AccountItem类，包含了4个私有成员：账户、口令、姓名和存款余额，以及公有成员构造函数、对象显示函数Display和存/取函数。在主函数中，创建了一个AccountItem对象，并通过输入身份验证来进行登录操作。如果登录成功，进入一个循环，等待用户选择操作，包括存款、取款和查询余额。用户可以反复进行操作，直到选择退出程序。

希望这个程序可以帮到你！