第三章 银行

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MyBank
{
    class Program
    {
        static void Main(string[] args)
        {

            Bank myBank = new Bank();
            myBank.Initial();
            Console.WriteLine("初始化帐户信息成功！");
            myBank.ShowAllUser();
            myBank.ShowCustomMenu();
            Console.ReadLine();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MyBank
{
    public class Bank
    {
        User user = new User(); 

        User[] _userGroup = new User[3];

        const string MESSAGE = "操作成功！";
        public void Initial()
        {
            _userGroup[0] = new User();
            _userGroup[0]._account = "179708064356";
            _userGroup[0]._name = "浅蓝";
            _userGroup[0]._password = "5200";
            _userGroup[0]._identityNum = "210050619890808185";
            _userGroup[0]._balance = 1000;

            _userGroup[1] = new User();
            _userGroup[1]._account = "179708064359";
            _userGroup[1]._name = "邓超";
            _userGroup[1]._password = "5201";
            _userGroup[1]._identityNum = "510010619891231127";
            _userGroup[1]._balance = 2000;

            _userGroup[2] = new User();
            _userGroup[2]._account = "179708064368";
            _userGroup[2]._name = "杨浩鹏";
            _userGroup[2]._password = "2222";
            _userGroup[2]._identityNum = "410207198904051271";
            _userGroup[2]._balance = 8000;
        }
        public void ShowAllUser()
        {
            foreach (User userItem in _userGroup)
            {
                Console.WriteLine("帐户姓名:" + userItem._name + " 帐号：" + userItem._account + " 存款余额：" + userItem._balance + "密码:" + userItem._password + "身份证号:" + userItem._identityNum);
              
            }
        }
        public void ShowCustomMenu()
        {
            string option = "";
            do
            {
                Console.WriteLine("==================欢迎使用自动银行服务==================");
                Console.WriteLine("1:开户 2:存款 3:取款 4:转账 5:查询余额 6:修改密码 0:退出");
                Console.WriteLine("========================================================");
                option = Console.ReadLine();
                switch (option)
                {
                    case "1":
                        CreateAccount();
                        continue;
                    case "2":
                        Deposit();
                        continue;
                    case "3":
                        WithDraw();
                        continue;
                    case "4":
                        continue;
                    case "5":
                        continue;
                    case "6":
                        continue;
                    case "0":
                        break;
                    default:
                        Console.WriteLine("输入无效！");
                        continue;
                }

                break;
            } while (true);
        }
        public void CreateAccount()
        {

            Console.WriteLine("请输入帐户姓名");
            user._name = Console.ReadLine();
            user._account = "179708064356";
            Console.WriteLine("请输入帐户密码");
            user._password = Console.ReadLine();
            Console.WriteLine("请输入帐户身份证号");
            user._identityNum = Console.ReadLine();
            Console.WriteLine("请输入帐户存款金额");
            user._balance = double.Parse(Console.ReadLine());

            Console.WriteLine("帐号：{0}，帐户姓名：{1}，存款金额：{2} {3}", user._account, user._name, user._balance, MESSAGE);

        }
        public void WithDraw()
        {
            string account = "";
            string pwd;

            Console.WriteLine("请输入帐号:");
            account = Console.ReadLine();
            if (account.Length == 0)
            {
                Console.WriteLine("输入的帐号不正确！");
                return;
            }

            User user = CheckUserByAccount(account);
            if (user == null)
            {
                Console.WriteLine("输入的帐号不正确！");
                return;
            }



            Console.WriteLine("请输入帐户密码:");
            pwd = Console.ReadLine();

            if (user._password != pwd)
            {
                Console.WriteLine("密码有误!");
                return;
            }

            Console.WriteLine("请输入取款金额");
            double money = double.Parse(Console.ReadLine());
            double result = user.MinusMoney(money);
            if (result == -1)
            {
                Console.WriteLine("取款失败");
            }
            else
            {
                Console.WriteLine("取款成功!当前余额:" + result);
            }
        }
        public void Deposit()
        {
            string account = "";
            double money = 0;

            Console.WriteLine("请输入账号:");
            account = Console.ReadLine();
            Console.WriteLine("请输入存入金额:");
            money = double.Parse(Console.ReadLine());


            User user;
            if ((user = CheckUserByAccount(account)) == null)
            {
                Console.WriteLine("您输入的账号不存在!");
            }

            if (user.SaveMoney(money) > 0)
            {
                Console.WriteLine(MESSAGE + "当前余额：" + user._balance);
            }
            else
            {
                Console.WriteLine("存款失败！");
            }

        }
        private User CheckUserByAccount(string account)
        {
            foreach (User user in _userGroup)
            {
                if (user._account == account)
                {
                    return user;
                }
            }
            return null;
        }
    }
}

Console.ReadLine(); } }}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MyBank
{
    public class User
    {
        #region 成员变量
        public string _name;
        public string _password;
        public string _identityNum;
        public double _balance;
        public string _account;
        #endregion

        #region 取款
        public double MinusMoney(double money)
        {
            if (money > 0)
            {
                if (money <= _balance)
                {
                    _balance -= money;
                    return _balance;
                }
                else
                {
                    return -1;
                }

            }
            else
            {
                return -1;
            }
        }
        #endregion

        #region 存款
        public double SaveMoney(double money)
        {
            if (money > 0)
            {

                _balance += money;
                return _balance;
            }
            else
            {
                return -1;
            }
        }
        #endregion
    }
}