C#相關(guān)程序設(shè)計(jì)

相關(guān)程序設(shè)計(jì)

一、實(shí)現(xiàn)一個(gè)Window窗體應(yīng)用程序，可以實(shí)現(xiàn)畫圓、計(jì)算、畫五環(huán)

與填充顏色的功能

代碼部分

創(chuàng)建一個(gè)新類，名叫DrawPic.cs

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Drawing;

usingSystem.Linq;

usingSystem.Text;

namespaceCaseOl

(

classDrawPic

(

#region屬性

//字段坐標(biāo)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;

)

)

〃字段寬高

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;

)

)

//結(jié)構(gòu)顏色

Colorc_color;

constdoublepi=3.14F;

#endregion

#region構(gòu)造函數(shù)

publicDrawPic()

(

)

III<summary>

III指定坐標(biāo)和寬高

III</summary>

III<paramname="x">x坐標(biāo)值</param>

III<paramname="y''>y坐標(biāo)值</param>

III<paramname="pwidth”>寬度</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指定坐標(biāo)和寬高構(gòu)造函數(shù)重載

III</summary>

III<paramname="x">x坐標(biāo)值</param>

III<paramname="y">y坐標(biāo)值</param>

III<paramname="pwidth”>寬度</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實(shí)現(xiàn)畫圓

III</summary>

III<paramname="f">所需畫圓的窗體</param>

publicvoidDrawCircle(System.Windows.Forms.Formf)

//在窗體上繪制一個(gè)畫圖圖面(畫布)

Graphicsg=f.CreateGraphics();

//創(chuàng)造一個(gè)畫筆指定畫筆顏色及畫筆寬度

Penpen=newPen(Color.Black,3);

//指定畫出的圖形質(zhì)量使用消除鋸齒

g.SmoothingMode=

System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

//使用畫筆畫圓

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

〃釋放畫布

g.Dispose();

〃釋放畫筆

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;

〃定義一個(gè)使用顏色的填充對(duì)象

Brushb=newSolidBrush(c_color);

〃填充一個(gè)形狀在固定的坐標(biāo)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("當(dāng)前圓的周長是{0:F2},面積是

{1：F2}!",c,s);

)

)

)

二、關(guān)于屬性的使用

創(chuàng)建一個(gè)Window窗體應(yīng)用程序

例子：學(xué)生年齡輸入合法性的判斷(成功實(shí)現(xiàn))

1、關(guān)于Form1.cs查看代碼可得：

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("年齡是：{0}",

myStudent.Age.ToStringO),"顯示年齡"，MessageBoxButtons.OK,

MessageBoxIcon.Information);

//myStudent.Name="zane";

//stringgrade=myStudent.Grade;

)

privatevoidbtnNo_Click(objectsender,EventArgse)

(

MessageBox.Show("該用戶的今年\t"+txtAge.Text+

"\T歲"，"顯示年齡",MessageBoxButtons.OK,

MessageBoxIcon.Information);

)

)

)

2、添加類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只讀

III</summary>

publicstringName

get{returnname;}

)

privatestringgrade;

III<summary>

III只寫

III</summary>

publicstringGrade

(

set{grade=value;}

)

)

)

三、參數(shù)的值傳遞(使用ref與out進(jìn)行)

自定義計(jì)算稅后工資

事例：工資計(jì)稅的方法為：低于等于3500不計(jì)稅，超出3500的部

分按10%繳稅

查看form.cs的代碼加以編寫

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("您的工資總額是：

｛0｝\n超出起征點(diǎn)｛1:F2｝元\n應(yīng)繳納｛2:F2｝元個(gè)人所得稅

",txtPay.Text.Trim(),pay,result),"稅率計(jì)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、構(gòu)造函數(shù)的使用

應(yīng)先添加Window窗體，代碼如下:

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="張靚靚"；

//zhang.Age=20;

//zhang.Hobby="唱歌歌"；

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

獄）

Studentzhang=newStudent("張靚靚"，20,"唱歌歌");

Studentjay=newStudent("周杰杰"，21,"耍雙節(jié)棍棍

")；

//Studentscofield=newStudent("Scofield");

scofield.SayHi();

zhang.SayHi();

jay.SayHi();

)

)

)

事例：學(xué)生的自我介紹，代碼如下：

Student.cs代碼

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年齡

III</summary>

privateintage;

publicintAge

(

get{returnage;}

set

(

〃屬性是聰明的字段

if(value>0&&value<100)

(

age=value;

)

else

(

age=18;

)

)

)

III<summary>

III愛好

Ill</summary>

privatestringhobby;

publicstringHobby

(

get{returnhobby;}

set{hobby=value;}

)

publicvoidSayHi()

(

stringmessage;

message=string.Format(

"大家好，我是{0}同學(xué)，今年{1}歲了，我喜歡

{2}o",

name,this.age,this.hobby

)；

MessageBox.Show(message);

)

}

)

五、應(yīng)先添加Windows窗體(MainForm.es查看代碼并進(jìn)行編

輯)

使用構(gòu)造函數(shù)實(shí)例化

1、StructStudent.cs的代碼如下

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceCaseStruct

(

publicenumGenders

(

Male,Female

)

//結(jié)構(gòu)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｝同學(xué)，今

年｛1｝歲了，我喜歡｛2｝。我的人氣值高達(dá)｛3｝!",this.Name,this.Age,

this.Hobby,this.Popularity);

MessageBox.Show(message);

)

)

)

2、MainForm.es代碼如下：

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="張靚靚"；

myStu.Popularity=100;

myStu.SayHi();

)

privatevoidTestStructNew()

(

StructStudentmyStu=newStructStudent("張靚靚",

Genders.Female,20,"唱歌歌"，100);

myStu.SayHi();

)

)

}

六、mySchool類

使用索引器知識(shí)點(diǎn)

1、MainForm.cs的代碼入下：

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();

)

〃測(cè)試入口

privatevoidbtnTestStudentClass_Click(objectsender,

EventArgse)

//TestValueReference();

TestArrayParameter();

//Testlndexer();

)

〃值類型和引用類型參數(shù)演示

privatevoidTestValueReference()

//傳遞引用類型參數(shù)

Studentscofield=newStudentf'Scofield",

Genders.Male,28,"越獄獄");

scofield.SayHi();

Vote(refscofield);

scofield.SayHi();

////傳遞值類型參數(shù)

//StructStudentscofieldnew

StructStudentf'Scofield",Genders.Male,28,"越獄獄");

//scofield.SayHi();

//Vote(refscofield);

//scofield.SayHi();

)

〃數(shù)組參數(shù)演示

privatevoidTestArrayParameter()

(

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

PrintArray(odd);

ChangeToEven(odd);

PrintArray(odd);

)

〃索引器演示

privatestaticvoidTestlndexer()

(

////采用數(shù)組屬性的方式

//MyClasslmyClassl=newMyClass1("T01");

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

////myClassl.Students『周杰杰"].SayHi();〃編譯出

錯(cuò)

//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氣值1

privatevoidVote(refStudentstu)

(

stu.Popularity++;

)

〃投票每次投票增加人氣值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班級(jí)類

III</summary>

classMyClass

publicMyClass(stringname)

=name;

this.students=newStudents();

)

〃班級(jí)名稱

privatestringname;

publicstringName

(

get{returnname;}

set{name=value;}

)

〃學(xué)員集合

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,"越獄獄");

students[1]=newStudent("張靚靚"，Genders.Female,

20,"唱歌歌");

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

21,"耍雙節(jié)棍棍)

)

〃班級(jí)名稱

privatestringname;

publicstringName

get{returnname;}

set{name=value;}

〃學(xué)員集合

privateStudentQstudents;

publicStudent[]Students

(

get{returnstudents;}

set{students=value;}

)

4、StructStudent.cs

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Text;

usingSystem.Windows.Forms;

namespaceMySchool

〃結(jié)構(gòu)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｝同學(xué),今

年｛1｝歲了，我喜歡｛2｝o我的人氣值高達(dá)｛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

)

//類版Student

classStudent

publicStudent():this("張靚靚"，Genders.Female,20,“唱

歌歌"，100){}

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

20,"打籃球"，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性別

III</summary>

privateGendersgender;

publicGendersGender

(

get{returngender;}

set{gender=value;}

)

III<summary>

III年齡

III</summary>

privateintage;

publicintAge

(

get{returnage;}

set

(

〃屬性是聰明的字段

if(value>0&&value<100)

age=value;

)

else

(

age=18;

)

)

)

〃人氣指數(shù)

privateintpopularity;

publicintPopularity

(

get{returnpopularity;}

set{popularity=value;}

)

III<summary>

III愛好

III</summary>

privatestringhobby;

publicstringHobby

get｛returnhobby;｝

set｛hobby=value;｝

)

publicvoidSayHi()

(

stringmessage;

message=string.Format("大家好，我是｛0｝同學(xué)，今

年｛1｝歲了，我喜歡｛2｝。我的人氣值高達(dá)｛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,"越獄獄");

students[1]=newStudent("張靚靚"，Genders.Female,

20,"唱歌歌)

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

21,"耍雙節(jié)棍棍)

)

〃基本索引器根據(jù)數(shù)組下標(biāo)查找學(xué)員

publicStudentthis[intindex]

(

get{returnstudents[index];}

)

〃〃與Java中的getter方法類比證明方法可以返回一個(gè)

類型

//publicStudentGetStudent(intindex)

//{

//returnstudents[index];

//)

〃重載的索引器根據(jù)姓名查找學(xué)員

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的相關(guān)應(yīng)用

事例：stringMethod發(fā)送電子郵件的相關(guān)代碼

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^,您輸入的電

子郵件格式不正確*"輸入提示)

returnfalse;

)

else

(

returntrue;

)

)

else

(

System.Windows.Forms.MessageBox.Show("對(duì)

不起，您必須輸入電子郵件"J輸入提示)

returnfalse;

)

)

III<summary>

Ill獲取用戶郵箱服務(wù)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發(fā)送郵件基礎(chǔ)類

III</summary>

III<paramname="mailAdd”>郵件目標(biāo)地址</param>

III<paramname="title">郵件標(biāo)題</param>

III<paramname="bodys”>郵件主體</param>

publicvoidsetMails(stringmailAdd,stringtitle,string

bodys)

(

MailMessagemails=newMailMessage();

mails.From=newMailAddress("\"郵件發(fā)送測(cè)試

\"admin@");//郵件來源地址"\"德和木業(yè)網(wǎng)

Vmuyew@dohigh.cc"

mails.To.Add(newMailAddress(mailAdd));〃郵件目標(biāo)

地址

mails.Subject=title;〃郵件標(biāo)題

mails.Body=bodys;〃郵件主體

mails.Priority=MailPriority.High;//使用最高郵件優(yōu)先

級(jí)

mails.IsBodyHtml=true;//使用Html格式的郵件

mails.BodyEncoding=System.Text.Encoding.GetEnc

oding("GB2312");〃設(shè)置郵件主體編碼格式

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(),”發(fā)送郵件

測(cè)試"，"這是測(cè)試郵件)

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

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

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

MessageBox.Show(string.Format("郵件發(fā)送

成功！郵件用戶名是：{0},郵件地址為：

{1}”,str[0].ToString(),string.Join("@",stij),"發(fā)送郵件",

MessageBoxButtons.OK,MessageBoxIcon.Information);

)

catch(Exceptionex)

(

MessageBox.Show。對(duì)不起，消息發(fā)送失敗，

可能的失敗原因是："+ex.Message,"發(fā)送失敗",

MessageBoxButtons.OK,MessageBoxIcon.Error);

)

)

)

)

)

八、簡易計(jì)算器

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

namespace簡易計(jì)算器1

(

classProgram

(

staticvoidMain(string[]args)

(

inti,j;

stringoper=

Console.WriteLine("簡易計(jì)算器V1.0");

Console.WriteLine();

Console.WriteLine("請(qǐng)輸入第一個(gè)數(shù)：");

Console.Write("?");

i=newProgram().vallnput();

Console.WriteLine("請(qǐng)輸入第二個(gè)數(shù):");

Console.Write("?")；

j=newProgram().vallnput();

Console.WriteLine("計(jì)算結(jié)果是:");

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

)

privateintvallnput()

(

try

(

returnintParse(Console.ReadLine());

)

catch

(

Console.WriteLine("對(duì)不起，您輸入的數(shù)字格式不

正確，請(qǐng)重新輸入！");

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("對(duì)不起，您輸入的數(shù)字格

式不正確!")；break;

)

)

}

}

九、網(wǎng)開始的程序練習(xí)

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

namespaceConsoleApplicationl

classProgram

staticvoidMain(string[]args)

(

Console.WriteLine("HelloWorld");

)

)

)

十、打開程序后出現(xiàn)的代碼

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

namespaceConsoleApplicationl

(

classProgram

(

staticvoidMain(string[]args)

)

)

}

十一、變■相關(guān)(兩個(gè)變量賦值后輸出)

(—)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｝歲，你們今年⑴歲。

",myAge,yourAge);〃占位符

)

)

)

(—)usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;