net编程.docx

1、net编程1、变量a、b、c之和为：55int a = 15, b, c, sum; b = c = 20; sum = a + b + c; lblShow.Text = 变量a、b、c之和为: + sum;2、枚举变量currentSeason的值为：11枚举变量nextSeason代表枚举元素：Winterpublic partial class Form1 : Form enum Season Spring = 10, Summer, Autumn = 20, Winter ; public Form1() InitializeComponent(); private void For

2、m1_Load(object sender, EventArgs e) Season currentSeason, nextSeason; currentSeason = Season.Summer; nextSeason = (Season)21; lblShow.Text = 枚举变量currentSeason的值为: + (int)currentSeason; lblShow.Text += n枚举变量nextSeason代表枚举元素: + nextSeason; 3、学生信息：姓名： 学号： 性别： 年龄public partial class Form1 : Form struct

3、Student public int stuNo; public string stuName; public int age; public char sex; public Form1() InitializeComponent(); private void Form1_Load(object sender, EventArgs e) Student stu; stu.stuNo = 1001; stu.stuName = 乔峰; stu.age = 23; stu.sex = 男; lblShow.Text = 学生信息:n姓名: + stu.stuName; lblShow.Text

4、 += n学号: + stu.stuNo; lblShow.Text += n性别: + stu.sex; lblShow.Text += n年龄: + stu.age; 4、算数运算符的应用测试private void Form1_Load(object sender, EventArgs e) int num1 = 5, num2 = 2; int a = num1 % num2; int b = num1 /num2 ; lblShow .Text = num1 + % + num2 + = + a ; lblShow .Text += n + num1 + / + num2 + = +

5、 b ; a=num1 +; b=-num2; lblShow .Text += n + a=num1+;后 num1 = + num1 + , a = + a ; lblShow .Text += n + b=-num2;后 num2 = + num2 + , b = + b; 5、赋值运算符及隐式数据类型转换应用测试private void Form1_Load(object sender, EventArgs e) int a, b = 5; char c = 中; a = c + 2; lblShow.Text = 整型变量a的值为: + a; double x = 42; x /=

6、b; lblShow .Text += n 浮点型变量x的值为: + x ; 6、测试关系运算符和逻辑运算符private void Form1_Load(object sender, EventArgs e) int a = 8, b = 5; bool k; k = a != b; lblShow.Text = a!=b;的结果是: + k; k = a = b & a =0 & a = 10 ;的结果是: + k; k = a = b & +a = 9; lblShow.Text += n a= b & +a = 9;的结果是: + k + ,a在执行后的结果是: + a; k = a

7、= b & +a = 9; lblShow.Text += n a= b & +a = 9;的结果是: + k + , a在执行后的结果是: + a; 7、数组及其应用演示private void Form1_Load(object sender, EventArgs e) int a = 23, 15, 27, 12, 24 ; int b = new int5; Array.Copy(a, b, 5); b3 = 18; Array.Clear(a, 0, 5); lblShow.Text = 数组b的原始值: + b0 + + b1 + + b2 + + b3 + + +b4 + n;

8、Array.Sort(b); lblShow.Text += 数组b排序后值: + b0 + + b1 + + b2 + + b3 + + +b4 + n; Array.Reverse(b); lblShow.Text += 反转数组b的值: + b0 + + b1 + + b2 + + b3 + + +b4 + n; int loc = Array.IndexOf(b, 18); lblShow.Text += 18是数组b中第 + (loc+1) + 个元素 ; 8、多维数组、数组型的数组的应用展示private void Form1_Load(object sender, EventAr

9、gs e) int, a = new int2, 3 1, 2, 3 , 4, 5, 5 ; int b = new int2; b0 = new int3 1, 2, 3 ; b1 = new int4 4, 5, 6, 7 ; lblShow.Text = a是二维数组，共6个数组元素，均为整数值。 n; lblShow.Text += b是一维数组，共2个数组元素，均为子数组。 n; lblShow.Text += a0,0的值为 + a0, 0; lblShow.Text += nb00的值为 + b00; 9、展示字符串及其应用public partial class Form1 :

10、 Form StringBuilder sb = new StringBuilder(); public Form1() InitializeComponent(); private void btnInsert_Click(object sender, EventArgs e) sb.Append(txtSource.Text); int pos = Convert.ToInt32(txtPos.Text); sb.Insert(pos, txtInsert.Text, 1); txtSource.Text = sb.ToString(); private void btnSelect_Cl

11、ick(object sender, EventArgs e) sb.Append(txtSource.Text); string str = sb.ToString(); int loc = str.IndexOf(txtSelect.Text); lblShow.Text = n查找的字符串在主串中的起始索引值为 + loc; 10、摄氏度转换 double c = Convert.ToInt32(txtCelsius.Text); double f = 9.0 / 5 * c + 32; txtFahrenheit.Text = f.ToString();11、简单的储蓄存款计算器：in

12、t money = Convert.ToInt32(txtMoney.Text); int year = Convert.ToInt32(txtYear.Text); double rate = Convert.ToDouble(txtRate.Text) / 100; double interest = money * rate * year; txtInterest.Text = interest.ToString(); double total = money + interest; txtTotal.Text = total.ToString();12、5个数字排序 double a

13、= new double5; int i = 0; public Form1() InitializeComponent(); private void button1_Click(object sender, EventArgs e) double element = double.Parse(txtElement.Text); ai = element; txtPrior.Text += ai + ; i+; lblNO .Text =第输入第+(i+1)+个元素; private void button2_Click(object sender, EventArgs e) Array.S

14、ort(a); txtSort.Text = a0 + + a1 + + a2 + + a3 + + a4; 13、创建一个Windows应用程序，输入n，求1+2+3+n。int n = Convert.ToInt32(txtNum.Text); int i = 1; int sum = 0; while (i = n) sum += i; i+; lblShow.Text = 1+2+.+ + n + = + sum;14、创建一个Windows应用程序，输入n，求n！，即1*2*3*n.int n = Convert.ToInt32(txtNum.Text); int i = 1; in

15、t sum = 1; do sum *= i; i+; while (i = n); lblShow.Text = 1*2*.* + n + = + sum;15、计算体重 double h, w, t; h = Convert.ToDouble(txtHeight.Text); w = Convert.ToDouble(txtWeight.Text); t = w / (h * h); if (t = 18 & t 25) lblShow.Text = 您的身材完全标准！; else if (t = 25 & t 27) lblShow.Text = 您的身材偏胖！; else lblSho

16、w.Text = 您的身材有点肥胖！;16、一个百万富翁遇到一个陌生人int i; double t, s1, s2; s1 = t = 0.01; s2 = 100000; for (i = 2; i = 30; i+) t = t * 2; s1 = s1 + t; s2 = s2 + 100000; lblShow.Text = String.Format(百万富翁给陌生人0:N2元。n 陌生人给百万富翁1:N2元。,s1,s2 );17、输入三角形行数，打印等腰三角形private void btnOk_Click(object sender, EventArgs e) int n =

17、 Convert.ToInt32(txtNum.Text); StringBuilder sb = new StringBuilder(); int i,j; for (i = 1; i = n; i+) sb.Append(); for (j = 1; j = 2 * i - 1; j+) sb.Append (*); sb.Append (n); lblShow.Text = sb.ToString();18、有一个函数：输入x，输出y函数计算（x1）(1=x=10) double X = Convert.ToDouble(txtX.Text); double y; if (X = 1 &

18、 X 10) y = 2 * X - 1; else y = 3 * X - 11; txtY.Text = y.ToString();19、输入联系人的姓名，电话和Email，单击“添加”扭，显示该联系人的相应信息。string name = txtname.Text; string phone = txtphone.Text; if (phone = ) phone = null; string email = txtemail.Text; if (email = ) email = null; AddressBook a = new AddressBook(name, phone, em

19、ail); txtmessage.Text = a.GetMessage(); class AddressBook private string name; private string phone; private string email; public AddressBook(string name, string phone, string email) this.name = name; this.phone = phone; this.email = email; public string Name get return name; public string Phone get

20、 if (phone = null) return 未输入; else return phone; set phone = value; public string Email get if (email = null) return 未输入; else return email; set email = value; public string GetMessage() return string.Format(姓名:0n电话:1n Email:2, Name, Phone, Email); 20、模拟银行账号管理系统public partial class creditNo : Form

21、public creditNo() InitializeComponent(); Account account; private void btnCrtsavingAc_Click(object sender, EventArgs e) account = new Account(); string message = String.Format(创建帐户成功，用户卡号为:0 , account.CreditNo); lblshow.Text = n + message + n; private void btnWithDraw_Click(object sender, EventArgs

22、e) string message; if (account = null) message = 请先创建帐户！; else if (txtWithDraw.Text = ) message = 请输入取款金额; else decimal money = decimal.Parse(txtWithDraw.Text); account.WithDraw(money, out message); lblshow.Text = n + message + n; private void btndeposit_Click(object sender, EventArgs e) string mess

23、age; if (account = null) message = 请先创建帐户！; else if (txtdeposit.Text = ) message = 请输入存款金额; else decimal money = decimal.Parse(txtdeposit.Text); account.Deposit(money, out message); lblshow.Text = n + message + n; private void Check_Click(object sender, EventArgs e) string message; if (account = nul

24、l) message = 请先创建帐户！; account .Check(out message ); lblshow.Text = n + message +n; public class Account protected int creditNo; protected decimal balance; public Account() Random r = new Random(); creditNo = r.Next(100000, 499999); balance = 100; public decimal Balance get return this.balance; publi

25、c int CreditNo get return this.creditNo; public virtual bool WithDraw(decimal money, out string message) if (money = money) balance -= money; message = 操作成功！n取款 + money + 元; return true; else message = 操作失败！n余额不足！; return false; public virtual bool Deposit(decimal money, out string message) if (mone

26、y 0) message = 操作失败！n输入金额不正确！; return false; else balance += money; message = 操作成功！n存款 + money + 元; return true; public decimal Check(out string message) message = 当前余额为 + balance + 元; return this.balance; 21、两个数计算public delegate int Caculate(int x,int y);public Caculate handler;int a = Convert.ToIn

27、t32(txtNum1.Text); int b = Convert.ToInt32(txtNum2.Text); MyMath math = new MyMath(); handler = new Caculate(math.Add); lblShow.Text +=两数之和：+ handler (a,b); handler = new Caculate (math.Multiply); lblShow.Text += n两数之积为： + handler(a, b);class MyMath public int Add(int x, int y) return x + y; public int Multiply(int x, int y) return x * y; 22、成绩管理系统确定 private void btnYes_Click(object sender, EventArgs e) string userName = txtName.Text;