Mybank

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

namespace MyBank
{
    class Bank
    {
        Card[] twos = new Card[100];
       public void fx() 
       {
           //第一张卡
           Card t1 = new Card();
           t1.kahao = "001";
           t1.mima = "001";
           t1.names = "小明";
           t1.yumoney = 100000;
           //第二张卡
           Card t2 = new Card();
           t2.kahao = "002";
           t2.mima = "002";
           t2.names = "小词";
           t2.yumoney = 004;
          
           twos[0] = t1;
           twos[1] = t2;
       }
       public void Show()

       {
           for (int i = 0; i < twos.Length; i++)
           {
               if (twos[i] != null)
               {
                   Console.WriteLine("持卡人:{0}	余额:{1}", twos[i].names, twos[i].yumoney);
               }
           }
           Console.WriteLine("=====================================================");
       }

      //欢迎界面
       public void huanying() 
       {
           bool flag = true;
           while (flag)
           {
               Console.WriteLine("
欢迎进入	某某某‘s 	的ATM系统
");
               Console.WriteLine("请选择功能模块，按照以下操作↓");
               Console.WriteLine("===============================欢迎使用自动银行服务============================= ");
               Console.WriteLine("1:开户	 2:存款	 3:取款	 4:查询余额	 5:转账	  6:修改密码	 7:退出");
               Console.WriteLine("================================================================================ ");
               string choice = Console.ReadLine();
               switch (choice)
               {
                   case "1":
                       //开户
                       kaihu();
                       break;
                   case "2":
                       //存款
                       MoneyIn();
                       break;
                   case "3":
                       //取款
                      MoneyOut();
                       break;
                   case "4":
                       //查询余额
                       chaxunMoney();
                       break;
                   case "5":
                       //转账
                       TransferMoney();
                       break;
                   case "6":
                       //修改密码
                       ModifyPwd();
                       break;
                   case"7":
                       //退出
                       Console.WriteLine("欢迎使用");
                       break;
                   default:
                       Console.WriteLine("您输入的有误,请从新输入！");
                       Console.WriteLine("");
                       break;
               }
               Console.ReadLine();
           }
           
       }
       //开户
       public void kaihu()
       {
           Console.WriteLine("这里是开户功能");
           Console.WriteLine("请输入账号：");
           string zh = Console.ReadLine();
           foreach (Card item in twos)
           {
               if (item.kahao.Equals(zh))
               {
                   Console.WriteLine("已有账号,请从新输入：");
                   zh = Console.ReadLine();
               }
               Console.WriteLine("请输入密码：");
               string kaPwd = Console.ReadLine();
               Console.WriteLine("请输入预存款金额：");
               double money = double.Parse(Console.ReadLine());
               Card two = new Card();
               two.kahao = zh;
               two.mima = kaPwd;
               two.yumoney = money;
               for (int i = 0; i < twos.Length; i++)
               {
                   if (twos[i] == null)
                   {
                       twos[i] = two;
                       Console.WriteLine("恭喜您,开户成功,您的卡号是{0}", zh);
                       break; 
                   } 
               }
               break;
           }
           Console.WriteLine("
是否返回主页面？(y/n)");
          char  num=char.Parse(Console.ReadLine());
           switch (num)
           {
               case 'y':
                   huanying();
                   break;
               case 'n':
                   Console.WriteLine("欢迎下次光临");
                   
                   break;
           }
           }
           
       //存款
       public void MoneyIn()
       {
           Console.WriteLine("欢迎进入存款区");
           Console.WriteLine("请输入账号");
           string zh2 = Console.ReadLine();
           bool flag = false;
           foreach (Card item in twos)
           {
               if (item != null)
               {
                   if (item.kahao.Equals(zh2))
                   {
                       flag = true;
                       Console.WriteLine("请输入存款金额");
                       double money = double.Parse(Console.ReadLine());
                       item.yumoney += money;
                       Console.WriteLine("存款成功,当前余额为:{0}", item.yumoney);
                       
                       break;
                   }
               }
           }
           if (flag == false)
           {
               Console.WriteLine("卡号不存在");
           }
           Console.WriteLine("
是否返回主页面？(y/n)");
           char num = char.Parse(Console.ReadLine());
           switch (num)
           {
               case 'y':
                   huanying();
                   break;
               case 'n':
                   Console.WriteLine("欢迎下次光临！凸^-^凸");

                   break;
           }
       }
       //取款
       public void MoneyOut() 
       {
           Console.WriteLine("请输入账号");
           string account = Console.ReadLine();
           bool kh = false;
           foreach (Card item in twos)
           {
               if (item != null)
               {
                   if (item.kahao.Equals(account))
                   {
                       kh = true;
                       Console.WriteLine("请输入密码");
                       string pwd2 = Console.ReadLine();
                       if (item.mima.Equals(pwd2))
                       {
                           Console.WriteLine("请输入取款金额");
                           double money = double.Parse(Console.ReadLine());
                           while (money > item.yumoney)
                           {
                               Console.WriteLine("余额不足，请重新输入取款金额");
                               money = double.Parse(Console.ReadLine());
                           }
                           item.yumoney -= money;
                           Console.WriteLine("取款成功");
                           Console.WriteLine("当前卡内余额{0}", item.yumoney);
                           break;


                       }
                       else
                       {
                           Console.WriteLine("密码错误");
                       }
                   }
               }
           }
           if (kh == false)
           {
               Console.WriteLine("没有该卡号");
           }
           Console.WriteLine("
是否返回主页面？(y/n)");
          char  num=char.Parse(Console.ReadLine());
           switch (num)
           {
               case 'y':
                   huanying();
                   break;
               case 'n':
                   Console.WriteLine("欢迎下次光临！");
                 
                   break;
           }
       }
       //查询余额
       public void chaxunMoney()
       {
           bool flag = false;
           Console.WriteLine("请输入卡号");
           string account = Console.ReadLine();
           Console.WriteLine("请输入密码");
           string pwd = Console.ReadLine();
           foreach (Card item in twos)
           {
               if (item!=null)
               {  
                   if (item.kahao.Equals(account) && item.mima.Equals(pwd))
                   {
                       flag=true;
                       Console.WriteLine("用户名是{0}的账户余额是{1}", item.names, item.yumoney);
                       break;
                   } 
               }    
           }
                    if (flag==false)
                           {
                                Console.WriteLine("账号有误,请从新输入");
                          }
            Console.WriteLine("
是否返回主页面？(y/n)");
          char  num=char.Parse(Console.ReadLine());
           switch (num)
           {
               case 'y':
                   huanying();
                   break;
               case 'n':
                   Console.WriteLine("欢迎下次光临！");
                  
                   break;
           }
       }
      
       //转账
       public void TransferMoney()
       {
           Console.WriteLine("请输入转出卡卡号");
           string zc = Console.ReadLine();
           bool fromIsOrNot = false;
           bool toIsOrNot = false;
            foreach (Card item in twos)
           {
               if (item!=null&&item.kahao.Equals(zc))
               {
                   fromIsOrNot = true;

           Console.WriteLine("请输入转出卡卡密码");
           string pwdFrom = Console.ReadLine();
                   if (item.mima.Equals(pwdFrom))
                   {
                   Console.WriteLine("请输入转入卡卡号");
                  string zr = Console.ReadLine();
                       foreach (Card toItem in twos)
                       {
                           if (toItem!=null&&toItem.kahao.Equals(zr))
                           {
                               toIsOrNot = true;
                               Console.WriteLine("请输入转账金额");
                               double money = double.Parse(Console.ReadLine());
                               while (money > item.yumoney) 
                               {
                                   Console.WriteLine("转账金额不够，请重新输入");
                                   money = double.Parse(Console.ReadLine());
                               }
                               item.yumoney -= money;
                               toItem.yumoney += money;
                               Console.WriteLine("转账成功，您的余额为{0}",item.yumoney);
                               break;
                           }

                       }
                       if (toIsOrNot==false)
                       {
                           Console.WriteLine("转入卡不存在");
                       }
                       break;
                   }
                   else
                   {
                       Console.WriteLine("转出卡密码错误");
                   }
               }
           }
           if (fromIsOrNot==false)
           {
               Console.WriteLine("转出卡不存在！");
           }
            Console.WriteLine("
是否返回主页面？(y/n)");
          char  num=char.Parse(Console.ReadLine());
           switch (num)
           {
               case 'y':
                   huanying();
                   break;
               case 'n':
                   Console.WriteLine("欢迎下次光临");
                   
                   break;
           }
       }
                
       //修改密码
       public string xinmima;
       public void ModifyPwd()
       {
               Console.WriteLine("请输入账号:");
               string no = Console.ReadLine();
               
               for (int i = 0; i < twos.Length; i++)
               {
                   if (twos[i] != null)
                   {
                       if (twos[i].kahao == no)
                       {
                           Console.WriteLine("请输入原密码:");
                           string mima1 = Console.ReadLine();
                           for (int j = 0; j < 3; j++)
                           {
                               if (twos[i].mima == mima1)
                               {
                                   Console.WriteLine("请输入新密码:");
                                   xinmima = Console.ReadLine();
                                   Console.WriteLine("请再次输入新密码:");
                                   if (xinmima == Console.ReadLine())
                                   {
                                       twos[i].mima = xinmima;
                                       Console.WriteLine("账户密码修改成功!!");
                                       break;
                                   }

                               }
                           }

                            break;
                       }
                   }
                   if (twos[i].kahao != no)
                   {

                       Console.WriteLine("您输入的账号不存在!");
                       break;

                   }
               }
            Console.WriteLine("
是否返回主页面？(y/n)");
          char  num=char.Parse(Console.ReadLine());
           switch (num)
           {
               case 'y':
                   huanying();
                   break;
               case 'n':
                   Console.WriteLine("欢迎下次光临");
                   break;
           }
           
       }
       
       }
    }

Card

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

namespace MyBank
{
    class Card
    {
        //卡号
        public string kahao;
        //密码
        public string mima;
        //持卡人
        public string names;
        //余额
        public double yumoney;
    }
}

Main()

namespace MyBank
{
    class Program
    {
        static void Main(string[] args)
        {
            Bank bank = new Bank();

            bank.fx();//卡信息
            bank.Show();//展示卡信息
            bank.huanying();//欢迎界面
            Console.ReadLine();
        }
    }
}