ATM模拟提款机

首先根据ATM属性构建对象

namespace BankSim {
    /// <summary>
    /// 银行账户
    /// </summary>
    public class Account {
        /// <summary>
        /// 卡号
        /// </summary>
        public string No { get; private set; }
        /// <summary>
        /// 余额
        /// </summary>
        public double Balance { get; private set; }
        /// <summary>
        /// 密码
        /// </summary>
        public string Password { get; set; }

        /// <summary>
        /// 构造器
        /// </summary>
        /// <param name="no">卡号</param>
        /// <param name="password">初始密码</param>
        /// <param name="balance">预存金额</param>
        public Account(string no, string password, double balance) {
            this.No = no;
            this.Password = password;
            this.Balance = balance;
        }

        /// <summary>
        /// 存款
        /// </summary>
        /// <param name="money">存入金额</param>
        /// <returns>存款成功返回true, 否则返回false</returns>
        public bool Deposit(double money) {
            if (money > 0) {
                Balance += money;
                return true;
            }
            return false;
        }

        /// <summary>
        /// 取款
        /// </summary>
        /// <param name="money">取款金额</param>
        /// <returns>取款成功返回true, 否则返回false</returns>
        public bool Withdraw(double money) {
            if (money > 0 && money <= Balance) {
                Balance -= money;
                return true;
            }
            return false;
        }
    }
}

设定默认账户跟密码生成方法

namespace BankSim {

    public class ATM {
        private Account[] accounts = new Account[3];
        private Account currentAccount = null;

        public ATM() {
            accounts[0] = new Account("11223344", "123321", 2300);
            accounts[1] = new Account("22334455", "147258", 500);
            accounts[2] = new Account("33445566", "808080", 9800);
        }

        public Account Account {
            get {
                throw new System.NotImplementedException();
            }
            set {
            }
        }

        /// <summary>
        /// 读卡
        /// </summary>
        /// <param name="no">卡号</param>
        /// <returns>读卡成功返回true, 否则返回false</returns>
        public bool ReadCard(string no) {
            currentAccount = FindByNo(no);
            return currentAccount != null;
        }

        /// <summary>
        /// 退卡
        /// </summary>
        public void QuitCard() {
            currentAccount = null;
        }

        /// <summary>
        /// 密码验证
        /// </summary>
        /// <param name="password">输入密码</param>
        /// <returns>密码正确返回true, 否则返回false</returns>
        public bool Verify(string password) {
            return currentAccount.Password == password;
        }

        /// <summary>
        /// 查看余额
        /// </summary>
        /// <returns></returns>
        public double ShowBalance() {
            return currentAccount.Balance;
        }

        /// <summary>
        /// 转账
        /// </summary>
        /// <param name="toAccountNo">转入账号</param>
        /// <param name="money">转入金额</param>
        /// <returns>转账成功返回true, 否则返回false</returns>
        public bool Transfer(string toAccountNo, double money) {
            Account toAccount = FindByNo(toAccountNo);
            if (money > 0) {
                if (toAccount != null) {
                    if (currentAccount.Withdraw(money)) {
                        toAccount.Deposit(money);
                        return true;
                    }
                }
            }
            return false;
        }

        /// <summary>
        /// 存款
        /// </summary>
        /// <param name="money">存入金额</param>
        /// <returns>存入成功返回true, 否则返回false</returns>
        public bool PutMoney(int money) {
            return currentAccount.Deposit(money);
        }

        /// <summary>
        /// 取款
        /// </summary>
        /// <param name="money">取出金额</param>
        /// <returns>取出成功返回true, 否则返回false</returns>
        public bool GetMoney(int money) {
            return currentAccount.Withdraw(money);
        }

        /// <summary>
        /// 修改密码
        /// </summary>
        /// <param name="oldPass">原密码</param>
        /// <param name="newPass">新密码</param>
        /// <returns>修改成功返回true, 否则返回false</returns>
        public bool ChangePassword(string oldPass, string newPass) {
            if (currentAccount.Password == oldPass) {
                currentAccount.Password = newPass;
                return true;
            }
            return false;
        }

        private Account FindByNo(string no) {
            for (int i = 0; i < accounts.Length; i++) {
                if (accounts[i].No == no) {
                    return accounts[i];
                }
            }
            return null;
        }
    }
}

调用属性方法运行

using System;

namespace BankSim {

    class Program {

        static void Main(string[] args) {
            ATM atm = new ATM();
            while (true) {
                Console.Write("插入银行卡: ");
                string no = Console.ReadLine();
                if (atm.ReadCard(no)) {
                    Console.Write("请输入密码: ");
                    string pass = Console.ReadLine();
                    if (atm.Verify(pass)) {
                        bool jx = true;
                        do {
                            Console.WriteLine("1. 查询余额");
                            Console.WriteLine("2. 存款");
                            Console.WriteLine("3. 取款");
                            Console.WriteLine("4. 修改密码");
                            Console.WriteLine("5. 转账");
                            Console.WriteLine("6. 退卡");
                            Console.Write("请选择: ");
                            int choice = Convert.ToInt32(Console.ReadLine());
                            switch (choice) {
                                case 1:
                                    Console.WriteLine("您的余额为: " + atm.ShowBalance());
                                    break;
                                case 2:
                                    Console.Write("请放入钞票: ");
                                    int money1 = Convert.ToInt32(Console.ReadLine());
                                    if (atm.PutMoney(money1)) {
                                        Console.WriteLine("存入成功!!!");
                                    }
                                    else {
                                        Console.WriteLine("无法识别!!!");
                                    }
                                    break;
                                case 3:
                                    Console.Write("请输入取款金额: ");
                                    int money2 = Convert.ToInt32(Console.ReadLine());
                                    if (atm.GetMoney(money2)) {
                                        Console.WriteLine("请从出钞口取走钞票");
                                    }
                                    else {
                                        Console.WriteLine("余额不足!!!");
                                    }
                                    break;
                                case 4:
                                    Console.Write("请输入原密码: ");
                                    string oldPass = Console.ReadLine();
                                    Console.Write("请输入新密码: ");
                                    string newPass1 = Console.ReadLine();
                                    Console.Write("请再次输入新密码: ");
                                    string newPass2 = Console.ReadLine();
                                    if (newPass1 == newPass2) {
                                        if (atm.ChangePassword(oldPass, newPass1)) {
                                            Console.WriteLine("修改成功!!!");
                                        }
                                        else {
                                            Console.WriteLine("修改失败!!!");
                                        }
                                    }
                                    else {
                                        Console.WriteLine("两次输入不一致!!!");
                                    }
                                    break;
                                case 5:
                                    Console.Write("请输入转入账户的账号: ");
                                    string toAccountNo = Console.ReadLine();
                                    Console.Write("请输入转账金额: ");
                                    double money3 = Convert.ToDouble(Console.ReadLine());
                                    if (atm.Transfer(toAccountNo, money3)) {
                                        Console.WriteLine("转账成功!!!");
                                    }
                                    else {
                                        Console.WriteLine("转账失败!!!");
                                    }
                                    break;
                                case 6:
                                    atm.QuitCard();
                                    jx = false;
                                    break;
                            } 
                        } while (jx);
                    }
                    else {
                        Console.WriteLine("密码错误!!!");
                    }
                }
                else {
                    atm.QuitCard();
                    Console.WriteLine("不要拿石头来开玩笑!!!");
                }
            }
        }
    }
}