.Net-C# 第一学期-第二章 上机练习+课后练习(简答题)
上机练习
上机练习1-
实现MyBank系统取款功能
using System;
namespace demo8
{
public class Show{
//用户名
public string name;
//账户名
public string id;
//存款金额
public double price;
//账户密码
public string pwd;
//确认密码
public string pwd2;
//判断是否正确
public Boolean isNam;
//登陆账户名
public string landName;
//登陆密码
public string landPwd;
public void show1()
{
Console.WriteLine("1.注册账号");
Console.WriteLine("2.取款");
string num = Console.ReadLine();
switch(num)
{
case "1":
show2();
break;
case "2":
show4();
break;
}
}
//注册
public void show2()
{
while (true)
{
Console.WriteLine("请输入账号:");
id = Console.ReadLine();
Console.WriteLine("请输入用户名：");
name = Console.ReadLine();
Console.WriteLine("请输入密码:");
pwd = Console.ReadLine();
Console.WriteLine("请再次确认密码：");
pwd2 = Console.ReadLine();
show3();
if (isNam==true)
{
Console.WriteLine("请输入存款金额:");
price = double.Parse(Console.ReadLine());
Console.WriteLine("账户:{0} ,用户名:{1} ,存款金额:
{2} ,创建成功!", id, name, price);
Console.WriteLine("1.注册账号");
Console.WriteLine("2.取款");
string num1 = Console.ReadLine();
switch (num1)
{
case "1":
show2();
return;
case "2":
show4();
return;
}
break;
}
Console.WriteLine("1.注册账号");
Console.WriteLine("2.取款");
string num = Console.ReadLine();
switch (num)
{
case "1":
show2();
return;
case "2":
show4();
return;
}
}
}
//注册判断
public void show3()
{
if (pwd.Equals(pwd2))
{
isNam = true;
}
else
{
Console.WriteLine("两次密码输入不一致");
isNam = false;
}
}
//登陆
public void show4()
{
Console.WriteLine("请输入账号:");
landName = Console.ReadLine();
Console.WriteLine("请输入密码:");
landPwd = Console.ReadLine();
show5();
}
//登陆判断+取款
public void show5()
{
if(landName.Equals(id))
{
if (landPwd.Equals(pwd))
{
Console.WriteLine("请输入取款金额:");
double price2 = double.Parse(Console.ReadLine());
if (price>=price2)
{
Console.WriteLine("取款成功");
Console.WriteLine("当前余额:" + (price -
price2));
}
else
{
Console.WriteLine("取款金额大于当前存款金
额!@");
}
}
else
{
Console.WriteLine("密码输入错误");
Console.WriteLine("1.注册账号");
Console.WriteLine("2.取款");
string num = Console.ReadLine();
switch (num)
{
case "1":
show2();
return;
case "2":
show4();
return;
}
}
}
else
{
Console.WriteLine("账号不存在");
Console.WriteLine("1.注册账号");
Console.WriteLine("2.取款");
string num = Console.ReadLine();
switch (num)
{
case "1":
show2();
return;
case "2":
show4();
return;
}
}
}
}
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Console.WriteLine("");
Show show = new Show();
show.show1();
}
}
}
上级练习2-
输出MyBank系统菜单
using System;
namespace demo9
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Console.WriteLine("欢迎使用自动银行服务\n");
Console.Write("1.开户 ");
Console.Write("2.存款 ");
Console.Write("3.取款 ");
Console.Write("4.转账 ");
Console.Write("5.查询余额 ");
Console.Write("6.修改密码 ");
Console.Write("0.退出 \n");
Console.WriteLine("\n请选择：");
string num = Console.ReadLine();
switch (num)
{
case "1":
break;
case "2":
break;
case "3":
break;
case "4":
break;
case "5":
break;
case "6":
break;
case "0":
break;
default:
Console.WriteLine("请输入正确编号！@");
break;
}
}
}
}
上机练习3-
初始化MyBank系统账户信息
省略
上机练习4-
实现MyBank系统
所有业务
using System;
namespace demo9
{
class Program
{
public class Show
{
//添加账号位置
public int index;
public string accountsName;
public string[] name=new string[10];
public string[] pwd = new string[10];
public double[] price = new double[10];
public string[] user = new string[10];
//开户账号
public string name1;
//开户密码
public string pwd1;
//开户确认密码
public string pwd2;
//开户名
public string user2;
//存款
public string depositName;
public string depositPwd;
public double price2;
//首页
public void home()
{
while (true)
{
Console.WriteLine("\n欢迎使用自动银行服务");
Console.Write("1.开户 ");
Console.Write("2.存款 ");
Console.Write("3.取款 ");
Console.Write("4.转账 ");
Console.Write("5.查询余额 ");
Console.Write("6.修改密码 ");
Console.Write("0.退出 \n");
Console.WriteLine("\n请选择：");
string num = Console.ReadLine();
switch (num)
{
case "1":
show1();
break;
case "2":
show2();
break;
case "3":
show3();
break;
case "4":
show4();
break;
case "5":
show5();
break;
case "6":
show6();
break;
case "0":
return;
default:
Console.WriteLine("请输入正确编号！@");
break;
}
}
}
//开户
public void show1()
{
Console.WriteLine("\nMyBank>开户");
Console.WriteLine("\n请输入昵称:");
user2 = Console.ReadLine();
Console.WriteLine("请输入账号");
name1 = Console.ReadLine();
if (JudgeName())
{
user[index] = user2;
name[index] = name1;
Console.WriteLine("请输入密码");
pwd1 = Console.ReadLine();
Console.WriteLine("请确认密码");
pwd2 = Console.ReadLine();
if(judgePwd())
{
Console.WriteLine("按任意键返回上一级");
string choice = Console.ReadLine();
if (choice.Equals("f"))
{
return;
}
else
{
return;
}
}
else
{
Console.WriteLine("两次密码不一致!@(自动返回上一级)\n");
return;
}
}
else
{
Console.WriteLine("该账号已存在(自动返回上一级)\n");
return;
}
}
//判断账号是否存在
public Boolean JudgeName()
{
for (int i = 0; i <= index; i++)
{
if (name[i]!=null && name[i].Equals(name1))
{
return false;
}
}
return true;
}
//判断两次密码是否一致，并添加
public Boolean judgePwd()
{
if (pwd1.Equals(pwd2))
{
for (int i = 0; i <= index; i++)
{
pwd[index] = pwd1;
Console.WriteLine("开户成功！@");
index++;
break;
}
return true;
}
return false;
}
//存款
public void show2()
{
Console.WriteLine("\nMyBank>存款");
Console.WriteLine("\n请输入账号:");
depositName = Console.ReadLine();
judgeDeposit();
}
//存款判断是否有该账号
public void judgeDeposit()
{
int num=0;
for (int i = 0; i < index; i++)
{
num++;
if (name[i].Equals(depositName))
{
Console.WriteLine("请输入密码:");
depositPwd = Console.ReadLine();
for (int k = 0; k < index; k++)
{
if (depositPwd.Equals(pwd[i]))
{
for (int j = 0; j < index; j++)
{
Console.WriteLine("欢迎回来:" + user[i]);
Console.WriteLine("当前余额:" + price[i]);
Console.WriteLine("\n存入金额:");
price2 = double.Parse(Console.ReadLine());
if (price2==0)
{
Console.WriteLine("禁止输入0");
break;
}
else
{
price[i] += price2;
Console.WriteLine("当前余额:" + price[i]);
Console.WriteLine("自动返回主页@");
break;
}
}
break;
}
else
{
Console.WriteLine("密码输入错误");
break;
}
}
return;
}
}
if(num==index)
{
Console.WriteLine("无该账号记录！@（请重新输入）");
return;
}
}
//取款
public void show3()
{
Console.WriteLine("MyBank>取款");
Console.WriteLine("\n请输入账号:");
depositName = Console.ReadLine();
qMoney();
}
//取款判断是否存在该账号
public void qMoney()
{
int num = 0;
for (int i = 0; i < index; i++)
{
if (depositName.Equals(name[i]))
{
Console.WriteLine("请输入密码:");
depositPwd = Console.ReadLine();
for (int k = 0; k < index; k++)
{
if (depositPwd.Equals(pwd[i]))
{
for (int j = 0; j < index; j++)
{
Console.WriteLine("欢迎回来:" + user[i]);
if (price[i]==0)
{
Console.WriteLine("当前余额:" + price[i]);
Console.WriteLine("按任意键返回@");
string num2 = Console.ReadLine();
if (num2.Equals("l"))
{
return;
}
else
{
return;
}
}
else
{
while (true)
{
Console.WriteLine("当前余额:" + price[i]);
Console.WriteLine("\n取款金额(或按000退出):");
price2 = double.Parse(Console.ReadLine());
if (price2 == 000)
{
Console.WriteLine("已返回");
return;
}
else if (price2 == 0)
{
Console.WriteLine("禁止输入0");
}
else if (price2 > price[i])
{
Console.WriteLine("取款金额大于当前金额@");
}
else
{
price[i] = price[i] - price2;
Console.WriteLine("当前余额:" + price[i]);
Console.WriteLine("自动返回主页@");
return;
}
}
}
}
}
}
}
}
if (num == index)
{
Console.WriteLine("无该账号记录！@（请重新输入）");
return;
}
}
//转账
public void show4()
{
Console.WriteLine("MyBank>转账");
Console.WriteLine("\n请输入您账号");
depositName = Console.ReadLine();
accounts();
}
//转账判断
public void accounts()
{
int num = 0;
int num2 = 0;
for (int i = 0; i < index; i++)
{
num++;
if (depositName.Equals(name[i]))
{
Console.WriteLine("请输入密码:");
depositPwd = Console.ReadLine();
if (price[i]==0)
{
Console.WriteLine("当前余额;" + price[i]);
Console.WriteLine("余额为“0”无法进行转账（自动返回）");
return;
}
else
{
if (depositPwd.Equals(pwd[i]))
{
Console.WriteLine("登陆成功！");
Console.WriteLine("当前余额;" + price[i]);
Console.WriteLine("请输入转账号码:");
accountsName = Console.ReadLine();
for (int j = 0; j < index; j++)
{
num2++;
if (accountsName.Equals(name[j]))
{
while (true)
{
Console.WriteLine("请输入转账金额 (按000返回主页):");
price2 = double.Parse(Console.ReadLine());
if (price2 > price[i])
{
Console.WriteLine("转账金额大于当前余额");
Console.WriteLine("当前余额:" + price[i]);
}
else if (price2==000)
{
Console.WriteLine("已返回");
return;
}
else if (price2 == 0)
{
Console.WriteLine("禁止输入0");
}
else
{
price[j] += price2;
price[i] = price[i] - price2;
Console.WriteLine("转账成功！@");
Console.WriteLine("当前余额:" + price[i]);
Console.WriteLine("自动返回上一级@");
return;
}
}
}
}
if (num2 == index)
{
Console.WriteLine("没有该账号记录（已自动返回）");
return;
}
}
else
{
Console.WriteLine("密码输入错误!@");
break;
}
}
}
}
if (num == index)
{
Console.WriteLine("没有该账号（已自动返回）");
return;
}
}
//查询余额
public void show5()
{
Console.WriteLine("MyBank>查询余额");
Console.WriteLine("请输入账号：");
depositName = Console.ReadLine();
query();
}
//查询判断
public void query()
{
int num2 =0;
for (int i = 0; i < index; i++)
{
num2++;
if (depositName.Equals(name[i]))
{
for (int j = 3; j >= 0; j--)
{
Console.WriteLine("请输入密码:");
depositPwd = Console.ReadLine();
if (depositPwd.Equals(pwd[i]))
{
Console.WriteLine("当前余额:" + price[i]);
Console.WriteLine("按任意键返回:");
string num = Console.ReadLine();
if (num.Equals("f"))
{
Console.WriteLine("已返回@");
return;
}
else
{
Console.WriteLine("已返回@");
return;
}
}
else
{
Console.WriteLine("密码输入错误！还有"+j+"次机会");
}
}
}
}
if (num2==index)
{
Console.WriteLine("没有该账号!@");
return;
}
}
public string modifyPwd;
//修改密码
public void show6()
{
Console.WriteLine("MyBank>修改密码");
Console.WriteLine("请输入账号：");
depositName = Console.ReadLine();
modify();
}
//修改密码判断
public void modify()
{
for (int i = 0; i < index; i++)
{
if (depositName.Equals(name[i]))
{
for (int j = 3; j >= 0; j--)
{
Console.WriteLine("请输入密码:");
depositPwd = Console.ReadLine();
if (depositPwd.Equals(pwd[i]))
{
for (; ; )
{
Console.WriteLine("请输入修改密码:");
modifyPwd = Console.ReadLine();
if (modifyPwd.Equals(pwd[i]))
{
Console.WriteLine("当前密码与原来密码一致，请更换");
}
else
{
Console.WriteLine("修改成功！@");
pwd[i] = modifyPwd;
return;
}
}
}
else
{
Console.WriteLine("密码输入错误!还有{0}次机会",j);
}
}
}
if (i==index)
{
Console.WriteLine("没有该账号记录");
return;
}
}
}
}
static void Main(string[] args)
{
Show show= new Show();
show.home();
}
}
}
上机练习6-
排序
using System;
namespace demo10
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
int[] numArray = new int[6];
for (int i = 0; i < numArray.Length; i++)
{
Console.WriteLine("请输入{0}个数:",i+1);
int num = int.Parse(Console.ReadLine());
numArray[i] = num;
}
Console.WriteLine("排序前:");
foreach (var item in numArray)
{
Console.Write("{0} ", item);
}
int index=0;
Console.WriteLine("\n排序后");
for (int i = 0; i < numArray.Length-1; i++)
{
for (int j = 0; j < numArray.Length-1-i; j++)
{
if (numArray[j]<numArray[j+1])
{
index = numArray[j + 1];
numArray[j + 1] = numArray[j];
numArray[j] = index;
}
}
}
foreach (var item in numArray)
{
Console.Write("{0} ", item);
}
}
}
}
简答题
1.学过那些循环
for循环，foreach循环，while循环，do-while循环，
2.输出数组中的数据
3.输出图案
4.-
平均成绩
//3科总分
int sum = 0;
//全班总分
int sum2 = 0;
//3科平均
double age = 0;
//全班平均
double age2 = 0;
//全班人数
int num2 = 0;
//最高分
int highest2 = 0;
for (int i = 0; i < 5; i++)
{
num2++;
Console.WriteLine("\n学生姓名:");
string name = Console.ReadLine();
for (int j = 0; j < 3; j++)
{
Console.WriteLine("第{0}门成绩是:",j+1);
int num = int.Parse(Console.ReadLine());
sum += num;
sum2 += sum;
}
if (highest2<sum)
{
highest2 = sum;
}
age = sum / 3;
Console.WriteLine("三门总分:{0},平均分是:{1}", sum,
age);
sum = 0;
}
age2 = sum2 / 5;
Console.WriteLine("班级人数:{0},最高分:{1},平均分:{2}",
num2, highest2, age2);
5.
略