C#相关程序设计

相关程序设计

一、实现一个Window窗体应用程序，可以实现画圆、计算、画五环

与填充颜色的功能

代码部分

创建一个新类，名叫DrawPic.cs

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Drawing;

usingSystem.Linq;

usingSystem.Text;

namespaceCaseOl

(

classDrawPic

(

#region属性

//字段坐标值

privateintx;

publicintX

(

get{returnx;}

set{

if(value<=0||value>=300)

x=150;

else

x=value;

)

)

privateinty;

publicintY

(

get{returny;}

set

(

if(value<100||value>130)

y=100;

else

y=value;

)

)

〃字段宽高

privateintp_width;

publicintP_width

get{returnp_width;}

set

if(value<=10||value>=380)

p_width=200;

else

p_width=value;

)

)

privateintp_height;

publicintP_height

(

get{returnp_height;}

set

(

if(value<=10||value>=160)

p_height=200;

else

p_height=value;

)

)

//结构颜色

Colorc_color;

constdoublepi=3.14F;

#endregion

#region构造函数

publicDrawPic()

(

)

III<summary>

III指定坐标和宽高

III</summary>

III<paramname="x">x坐标值</param>

III<paramname="y''>y坐标值</param>

III<paramname="pwidth”>宽度</param>

III<paramname="pheight">M^</param>

publicDrawPic(stringX.stringY,stringP_width,string

P_height)

(

this.X=int.Parse(X);

this.Y=int.Parse(Y);

this.P_width=int.Parse(P_width);

this.P_height=int.Parse(P_height);

)

III<summary>

Ill指定坐标和宽高构造函数重载

III</summary>

III<paramname="x">x坐标值</param>

III<paramname="y">y坐标值</param>

III<paramname="pwidth”>宽度</param>

III<paramname="pheight">高度</param>

III<paramname="colors">Mfe</param>

publicDrawPic(stringX,stringY,stringP_width,string

P_height,Colorcolors)

(

this.X=int.Parse(X);

this.Y=int.Parse(Y);

this.P_width=int.Parse(P_width);

this.P_height=int.Parse(P_height);

this.c_color=colors;

)

#endregion

III<summary>

III实现画圆

III</summary>

III<paramname="f">所需画圆的窗体</param>

publicvoidDrawCircle(System.Windows.Forms.Formf)

//在窗体上绘制一个画图图面(画布)

Graphicsg=f.CreateGraphics();

//创造一个画笔指定画笔颜色及画笔宽度

Penpen=newPen(Color.Black,3);

//指定画出的图形质量使用消除锯齿

g.SmoothingMode=

System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

//使用画笔画圆

g.DrawEllipse(pen,newRectangle(x,y,p_width,p_height));

〃释放画布

g.Dispose();

〃释放画笔

pen.Dispose();

)

publicvoidFillColor(System.Windows.Forms.Formf)

(

Graphicsg=f.CreateGraphics();

Penpen=newPen(Color.Black,3);

g.SmoothingMode=

System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

g.lnterpolationMode

System.Drawing.Drawing2D.lnterpolationMode.High;

〃定义一个使用颜色的填充对象

Brushb=newSolidBrush(c_color);

〃填充一个形状在固定的坐标上

g.FillEllipse(b,x+1.5F,y+1.5F,p_height-3,

p_width-3);

g.Dispose();

pen.Dispose();

)

publicstringgetResult(intd)

(

doublec=pi*d;

doubles=pi*((d/2)*(d/2));

returnstring.Format("当前圆的周长是{0:F2},面积是

{1：F2}!",c,s);

)

)

)

二、关于属性的使用

创建一个Window窗体应用程序

例子：学生年龄输入合法性的判断(成功实现)

1、关于Form1.cs查看代码可得：

usingSystem;

usingSystem.Collections.Generic;

usingSystem.ComponentModel;

usingSystem.Data;

usingSystem.Drawing;

usingSystem.Linq;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceCase02

(

publicpartialclassForml:Form

(

publicForml()

(

lnitializeComponent();

)

privatevoidbtnMsg_Click(objectsender,EventArgse)

(

studentmyStudent=newstudent();

myStudent.Age=int.Parse(txtAge.Text.Trim());

MessageBox.Show(string.Format("年龄是：{0}",

myStudent.Age.ToStringO),"显示年龄"，MessageBoxButtons.OK,

MessageBoxIcon.Information);

//myStudent.Name="zane";

//stringgrade=myStudent.Grade;

)

privatevoidbtnNo_Click(objectsender,EventArgse)

(

MessageBox.Show("该用户的今年\t"+txtAge.Text+

"\T岁"，"显示年龄",MessageBoxButtons.OK,

MessageBoxIcon.Information);

)

)

)

2、添加类student.cs

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

namespaceCase02

(

classstudent

privateintage;

publicintAge

get{returnage;}

set

(

if(value>0&&value<110)

(

age=value;

)

else

(

age=18;

)

)

)

privatestringname;

III<summary>

III只读

III</summary>

publicstringName

get{returnname;}

)

privatestringgrade;

III<summary>

III只写

III</summary>

publicstringGrade

(

set{grade=value;}

)

)

)

三、参数的值传递(使用ref与out进行)

自定义计算税后工资

事例：工资计税的方法为：低于等于3500不计税，超出3500的部

分按10%缴税

查看form.cs的代码加以编写

usingSystem;

usingSystem.Collections.Generic;

usingSystem.ComponentModel;

usingSystem.Data;

usingSystem.Drawing;

usingSystem.Linq;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceCase03

(

publicpartialclassForml:Form

(

publicForml()

(

lnitializeComponent();

)

privatevoidbtnAccount_Click(objectsender,EventArgse)

(

intpay=int.Parse(txtPay.Text.Trim());

doubleresult=0.00F;

getResult(refpay,outresult);

MessageBox.Show(string.Format("您的工资总额是：

｛0｝\n超出起征点｛1:F2｝元\n应缴纳｛2:F2｝元个人所得税

",txtPay.Text.Trim(),pay,result),"税率计算",

MessageBoxButtons.OK,MessageBoxIcon.Information);

)

privatevoidgetResult(refintpay,outdoubleresult)

pay-=3500;

if(pay<1500)

(

result=0.00F;

)

elseif(pay>=1500&&pay<4500)

(

result=pay*0.1F;

}

elseif(pay>=4500&&pay<9000)

(

result=pay*0.2F;

)

elseif(pay>=9000&&pay<35000)

(

result=pay*0.25F;

)

elseif(pay>=35000&&pay<55000)

result=pay*0.3F;

)

elseif(pay>=55000&&pay<80000)

(

result=pay*0.35F;

)

else

(

result=pay*0.45F;

)

)

)

)

四、构造函数的使用

应先添加Window窗体，代码如下:

usingSystem;

usingSystem.Collections.Generic;

usingSystem.ComponentModel;

usingSystem.Data;

usingSystem.Drawing;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceCase04

publicpartialclassMainForm:Form

(

publicMainForm()

(

lnitializeComponent();

)

privatevoidbtnExit_Click(objectsender,EventArgse)

(

this.Close();

)

privatevoidbtnTestStudentClass_Click(objectsender,

EventArgse)

(

//Studentzhang=newStudent();

//zhang.Name="张靓靓"；

//zhang.Age=20;

//zhang.Hobby="唱歌歌"；

Studentscofield=newStudent("Scofield",28,"越狱

狱）

Studentzhang=newStudent("张靓靓"，20,"唱歌歌");

Studentjay=newStudent("周杰杰"，21,"耍双节棍棍

")；

//Studentscofield=newStudent("Scofield");

scofield.SayHi();

zhang.SayHi();

jay.SayHi();

)

)

)

事例：学生的自我介绍，代码如下：

Student.cs代码

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceCase04

classStudent

publicStudent(){}

publicStudent(stringname)

(

this.Name=name;

)

publicStudent(stringname,intage,stringhobby)

(

this.Name=name;

this.Age=age;

this.Hobby=hobby;

)

III<summary>

III姓名

III</summary>

privatestringname;

publicstringName

get{returnname;}

set{name=value;}

)

Ill<summary>

III年龄

III</summary>

privateintage;

publicintAge

(

get{returnage;}

set

(

〃属性是聪明的字段

if(value>0&&value<100)

(

age=value;

)

else

(

age=18;

)

)

)

III<summary>

III爱好

Ill</summary>

privatestringhobby;

publicstringHobby

(

get{returnhobby;}

set{hobby=value;}

)

publicvoidSayHi()

(

stringmessage;

message=string.Format(

"大家好，我是{0}同学，今年{1}岁了，我喜欢

{2}o",

name,this.age,this.hobby

)；

MessageBox.Show(message);

)

}

)

五、应先添加Windows窗体(MainForm.es查看代码并进行编

辑)

使用构造函数实例化

1、StructStudent.cs的代码如下

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceCaseStruct

(

publicenumGenders

(

Male,Female

)

//结构版Student

structStructStudent

(

publicstringName;

publicGendersGender;

publicintAge;

publicstringHobby;

publicintPopularity;

publicStructStudent(stringname,Gendersgender,int

age,stringhobby):this(name,gender,age,hobby,100)｛｝

publicStructStudent(stringname,Gendersgender,int

age,stringhobby,intpopularity)

(

this.Name=name;

this.Gender=gender;

this.Age=age;

this.Hobby=hobby;

this.Popularity=popularity;

)

publicvoidSayHi()

(

stringmessage;

message=string.Format("大家好，我是｛0｝同学，今

年｛1｝岁了，我喜欢｛2｝。我的人气值高达｛3｝!",this.Name,this.Age,

this.Hobby,this.Popularity);

MessageBox.Show(message);

)

)

)

2、MainForm.es代码如下：

usingSystem;

usingSystem.Collections.Generic;

usingSystem.ComponentModel;

usingSystem.Data;

usingSystem.Drawing;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceCaseStruct

(

publicpartialclassMainForm:Form

(

publicMainForm()

(

lnitializeComponent();

)

privatevoidbtnExit_Click(objectsender,EventArgse)

(

this.Close();

)

privatevoidbtnTest_Click(objectsender,EventArgse)

//不使用new

//TestStruct();

//使用new

TestStructNew();

)

privatevoidTestStruct()

(

StructStudentmyStu;

myStu.Age=20;

myStu.Gender=Genders.Female;

myStu.Hobby="唱歌歌"；

myStu.Name="张靓靓"；

myStu.Popularity=100;

myStu.SayHi();

)

privatevoidTestStructNew()

(

StructStudentmyStu=newStructStudent("张靓靓",

Genders.Female,20,"唱歌歌"，100);

myStu.SayHi();

)

)

}

六、mySchool类

使用索引器知识点

1、MainForm.cs的代码入下：

usingSystem;

usingSystem.Collections.Generic;

usingSystem.ComponentModel;

usingSystem.Data;

usingSystem.Drawing;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceMySchool

(

publicpartialclassMainForm:Form

(

publicMainForm()

(

lnitializeComponent();

)

privatevoidbtnExit_Click(objectsender,EventArgse)

this.Close();

)

〃测试入口

privatevoidbtnTestStudentClass_Click(objectsender,

EventArgse)

//TestValueReference();

TestArrayParameter();

//Testlndexer();

)

〃值类型和引用类型参数演示

privatevoidTestValueReference()

//传递引用类型参数

Studentscofield=newStudentf'Scofield",

Genders.Male,28,"越狱狱");

scofield.SayHi();

Vote(refscofield);

scofield.SayHi();

////传递值类型参数

//StructStudentscofieldnew

StructStudentf'Scofield",Genders.Male,28,"越狱狱");

//scofield.SayHi();

//Vote(refscofield);

//scofield.SayHi();

)

〃数组参数演示

privatevoidTestArrayParameter()

(

int[]odd={1,3,5};

PrintArray(odd);

ChangeToEven(odd);

PrintArray(odd);

)

〃索引器演示

privatestaticvoidTestlndexer()

(

////采用数组属性的方式

//MyClasslmyClassl=newMyClass1("T01");

//myClassl.Students[2].SayHi();

////myClassl.Students『周杰杰"].SayHi();〃编译出

错

//采用索引器的方式

MyClassmyClass=newMyClass("T01");

myClass.Students[2].SayHi();

myClass.Students「周杰杰”].SayHi();

)

//投票每次投票增加人气值1

privatevoidVote(refStudentstu)

(

stu.Popularity++;

)

〃投票每次投票增加人气值1

privatevoidVote(refStructStudentstu)

(

stu.Popularity++;

)

privatevoidChangeToEven(int[]arr)

(

for(inti=0;i<arr.Length;i++)

(

arr[i]=i*2;

)

)

privatevoidPrintArray(int[]arr)

for(inti=0;i<arr.Length;i++)

Console.WriteLine("arr[{0}]={1i,arr[i]);

)

)

)

)

2、MyClass.es

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

namespaceMySchool

(

III<summary>

III班级类

III</summary>

classMyClass

publicMyClass(stringname)

=name;

this.students=newStudents();

)

〃班级名称

privatestringname;

publicstringName

(

get{returnname;}

set{name=value;}

)

〃学员集合

privateStudentsstudents;

internalStudentsStudents

(

get{returnstudents;}

set{students=value;}

)

)

}

3、MyClassl.cs

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

namespaceMySchool

(

classMyClassl

(

publicMyClassl(stringname)

(

=name;

this.students=newStudent[3];

students[O]=newStudent("Scofield",Genders.Male,

28,"越狱狱");

students[1]=newStudent("张靓靓"，Genders.Female,

20,"唱歌歌");

students[2]=newStudent("周杰杰"，Genders.Male,

21,"耍双节棍棍)

)

〃班级名称

privatestringname;

publicstringName

get{returnname;}

set{name=value;}

〃学员集合

privateStudentQstudents;

publicStudent[]Students

(

get{returnstudents;}

set{students=value;}

)

4、StructStudent.cs

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceMySchool

〃结构版Student

structStructStudent

publicstringName;

publicGendersGender;

publicintAge;

publicstringHobby;

publicintPopularity;

publicStructStudent(stringname,Gendersgender,int

age,stringhobby):this(name,gender,age,hobby,100){}

publicStructStudent(stringname,Gendersgender,int

age,stringhobby,intpopularity)

(

this.Name=name;

this.Gender=gender;

this.Age=age;

this.Hobby=hobby;

this.Popularity=popularity;

)

publicvoidSayHi()

stringmessage;

message=string.Format("大家好,我是｛0｝同学,今

年｛1｝岁了，我喜欢｛2｝o我的人气值高达｛3｝!",this.Name,

this.Age,this.Hobby,this.Popularity);

MessageBox.Show(message);

)

}

)

5、Student.es

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceMySchool

(

publicenumGenders

(

Male,Female

)

//类版Student

classStudent

publicStudent():this("张靓靓"，Genders.Female,20,“唱

歌歌"，100){}

publicStudent(stringname):this(name,Genders.Male,

20,"打篮球"，100){}

publicStudent(stringname,Gendersgender,intage,

stringhobby):this(name,gender,age,hobby,100){}

publicStudent(stringname,Gendersgender,intage,

stringhobby,intpopularity)

(

this.Name=name;

this.Gender=gender;

this.Age=age;

this.Hobby=hobby;

this.Popularity=popularity;

)

III<summary>

III姓名

III</summary>

privatestringname;

publicstringName

get{returnname;}

set{name=value;}

)

III<summary>

III性别

III</summary>

privateGendersgender;

publicGendersGender

(

get{returngender;}

set{gender=value;}

)

III<summary>

III年龄

III</summary>

privateintage;

publicintAge

(

get{returnage;}

set

(

〃属性是聪明的字段

if(value>0&&value<100)

age=value;

)

else

(

age=18;

)

)

)

〃人气指数

privateintpopularity;

publicintPopularity

(

get{returnpopularity;}

set{popularity=value;}

)

III<summary>

III爱好

III</summary>

privatestringhobby;

publicstringHobby

get｛returnhobby;｝

set｛hobby=value;｝

)

publicvoidSayHi()

(

stringmessage;

message=string.Format("大家好，我是｛0｝同学，今

年｛1｝岁了，我喜欢｛2｝。我的人气值高达｛3｝!",,this.age,

this.hobby,this.popularity);

MessageBox.Show(message);

)

)

)

6、Students.es

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

namespaceMySchool

classStudents

privateStudent[]students=newStudent[3];

publicStudents()

(

students[O]=newStudent("Scofield",Genders.Male,

28,"越狱狱");

students[1]=newStudent("张靓靓"，Genders.Female,

20,"唱歌歌)

students[2]=newStudent("周杰杰*Genders.Male,

21,"耍双节棍棍)

)

〃基本索引器根据数组下标查找学员

publicStudentthis[intindex]

(

get{returnstudents[index];}

)

〃〃与Java中的getter方法类比证明方法可以返回一个

类型

//publicStudentGetStudent(intindex)

//{

//returnstudents[index];

//)

〃重载的索引器根据姓名查找学员

publicStudentthis[stringname]

(

get

(

inti;

boolfound=false;

for(i=0;i<students.Length;i++)

(

if(students[i].Name==name)

(

found=true;

break;

)

)

if(found)

(

returnstudents[i];

)

else

returnnull;

)

)

)

)

)

七、string的相关应用

事例：stringMethod发送电子邮件的相关代码

1、CheckMail.cs

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

usingSystem.Net;

usingSystem.Net.Mail;

namespacestringMethod

(

classCheckMail

publicboolCheck(stringemail)

if(!string.lsNullOrEmpty(email))

if(email.lndexOf("@")==-1)

(

System.Windows.Forms.MessageBox.Showf7^,您输入的电

子邮件格式不正确*"输入提示)

returnfalse;

)

else

(

returntrue;

)

)

else

(

System.Windows.Forms.MessageBox.Show("对

不起，您必须输入电子邮件"J输入提示)

returnfalse;

)

)

III<summary>

Ill获取用户邮箱服务器地址

III</summary>

III<paramname="email"></param>

III<returns></returns>

publicstringGetMailAddress(stringemail)

(

string[]s_mail=email.Split('@');

if(string.Equals(s_mail[1],"163.com")||

string.Equals(s_mail[1],"126.com")||string.Equals(s_mail[1],

""))

(

return"";

)

elseif(string.Equals(s_mail[1],""))

(

return"";

)

elseif(string.Equals(s_mail[1],"188.com"))

(

return"";

)

elseif(string.Equals(s_mail[1],"263.net")||

string.Equals(s_mail[1],"263.")||string.Equals(s_mail[1],

""))

(

return"";

)

elseif(string.Equals(s_mail[1],"")||

string.Equals(s_mail[1],""))

(

return"/";

)

elseif(string.Equals(s_mail[1],""))

(

return"";

)

elseif(string.Equals(s_mail[1],"")||

string.Equals(s_mail[1],"")||string.Equals(s_mail[1],

""))

(

return"/cgi-bin/loginpage";

)

elseif(string.Equals(s_mail[1],"")||

string.Equals(s_mail[1],""))

return"";

)

else

(

return"http://mail."+s_mail[1].ToString();

)

)

III<summary>

III发送邮件基础类

III</summary>

III<paramname="mailAdd”>邮件目标地址</param>

III<paramname="title">邮件标题</param>

III<paramname="bodys”>邮件主体</param>

publicvoidsetMails(stringmailAdd,stringtitle,string

bodys)

(

MailMessagemails=newMailMessage();

mails.From=newMailAddress("\"邮件发送测试

\"admin@");//邮件来源地址"\"德和木业网

Vmuyew@dohigh.cc"

mails.To.Add(newMailAddress(mailAdd));〃邮件目标

地址

mails.Subject=title;〃邮件标题

mails.Body=bodys;〃邮件主体

mails.Priority=MailPriority.High;//使用最高邮件优先

级

mails.IsBodyHtml=true;//使用Html格式的邮件

mails.BodyEncoding=System.Text.Encoding.GetEnc

oding("GB2312");〃设置邮件主体编码格式

SmtpCIientsc=new

SmtpClient("");//

sc.Credentials=new

NetworkCredential("admin@","mujie-hr");

//admin@mujie2009

try

(

sc.Send(mails);

)

catch(Exceptionex)

{throwex;}

)

)

}

2、Form1.cs

usingSystem;

usingSystem.Collections.Generic;

usingSystem.ComponentModel;

usingSystem.Data;

usingSystem.Drawing;

usingSystem.Linq;

usingSystem.Text;

usingSystem.Windows.Forms;

namespacestringMethod

(

publicpartialclassForml:Form

(

publicForml()

(

lnitializeComponent();

)

privatevoidbtnSet_Click(objectsender,EventArgse)

CheckMailcm=newCheckMail();

if(cm.Check(textBox1.Text.Trim()))

try

(

cm.setMails(textBox1.Text.Trim(),”发送邮件

测试"，"这是测试邮件)

System.Diagnostics.Process.Start("IExplore.exe",cm.GetMailAddr

ess(textBox1.Text.Trim()));

string[]str=textBox1.Text.Trim().Split('@');

MessageBox.Show(string.Format("邮件发送

成功！邮件用户名是：{0},邮件地址为：

{1}”,str[0].ToString(),string.Join("@",stij),"发送邮件",

MessageBoxButtons.OK,MessageBoxIcon.Information);

)

catch(Exceptionex)

(

MessageBox.Show。对不起，消息发送失败，

可能的失败原因是："+ex.Message,"发送失败",

MessageBoxButtons.OK,MessageBoxIcon.Error);

)

)

)

)

)

八、简易计算器

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

namespace简易计算器1

(

classProgram

(

staticvoidMain(string[]args)

(

inti,j;

stringoper=

Console.WriteLine("简易计算器V1.0");

Console.WriteLine();

Console.WriteLine("请输入第一个数：");

Console.Write("»");

i=newProgram().vallnput();

Console.WriteLine("请输入第二个数:");

Console.Write("»")；

j=newProgram().vallnput();

Console.WriteLine("计算结果是:");

Console.WriteLine(newProgram().(oper,i,j));

)

privateintvallnput()

(

try

(

returnintParse(Console.ReadLine());

)

catch

(

Console.WriteLine("对不起，您输入的数字格式不

正确，请重新输入！");

Console.Write("»");

returnvallnput();

)

)

privatestringfghf(stringoper,inti,intj)

stringstr;

switch(str)

case

str=Convert.ToString(i+j);break;

case

str=Convert.ToString(i-j);break;

case

str=Convert.ToString(i*j);break;

case

str=Convert.ToString(i/j);break;

default:

Console.WhteLine("对不起，您输入的数字格

式不正确!")；break;

)

)

}

}

九、网开始的程序练习

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

namespaceConsoleApplicationl

classProgram

staticvoidMain(string[]args)

(

Console.WriteLine("HelloWorld");

)

)

)

十、打开程序后出现的代码

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

namespaceConsoleApplicationl

(

classProgram

(

staticvoidMain(string[]args)

)

)

}

十一、变■相关(两个变量赋值后输出)

(—)usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

namespaceConsoleApplicationl

(

classProgram

(

staticvoidMain(string[]args)

(

Console.WriteLine("HelloWorld");

intmyAge,yourAge;

myAge=31;yourAge=21;

Console.WriteLine("我今年｛0｝岁，你们今年⑴岁。

",myAge,yourAge);〃占位符

)

)

)

(—)usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;