C#應(yīng)用程序設(shè)計(jì)教程 第二版+課后習(xí)題答案

第一章1.判斷題(1)x(2)V(3)V(4)X(5)xV2.選擇題(1)C(2)B(3)B(4)C(5)D(6)C3.編程題usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespaceConsoleApplication1classProgramstaticvoidMain(stringargs)Console.WriteLine("HelloC#");第二章1. 判斷下列符號(hào)哪些是合法的C#變量名稱北京abc_xyzx_y2根據(jù)要求寫出C#表達(dá)式(1)N%3=0&N%5=0(2)(char)newRandom().Next(67,74)(3) Math.Pow(x,3)*y/(x+y)(4) Math.Sqrt(b*b-4*a*c)3. 判斷題(1)x(2)V(3)V(4)V(5)V(6)x(7)V(8)V(9)V(10)x(11)V(12)x4. 選擇題(1)B(2)C(3)B(4)B(5)C(6)B(7)D(8)B(9)C(10)A5. 分析并寫出下列程序運(yùn)行結(jié)果(1)a=21,b=9,c=16y=4(2)b=41(3)s=6(4)a0=28a1=15a2=39a3=48a4=396. 程序填空(1) 3aiaia5-ia5-i(2) i%5=0|i%7=0s+i7.編程題(1)staticvoidMain(stringargs)ints,i,j;for(i=2;i<1000;i+)s=0;for(j=1;j<i;j+)if(i%j=0)s+=j;if(i=s)Console.WriteLine("0",i);(2)staticvoidMain(stringargs)int,a=2,5,18,4,3,4,9,2,4,1,16,8,5,2,14,6;inti,j,k,max,maxj;for(i=0;i<4;i+)max=ai,0;maxj=0;for(j=1;j<4;j+)if(max<ai,j)max=ai,j;maxj=for(k=0;k<4;k+)if(ak,maxj<max)break;if(k=4)Console.WriteLine("鞍點(diǎn)：第0行，第1列"，i+l,maxj+l);staticvoidMain(stringargs)inta=20,b=16,i=20;doif(i%a=0&i%b=0)break;3)i+;while(true);Console.WriteLine("最小公倍數(shù)：0",i);i=16;doif(a%i=0&b%i=0)break;i-;while(true);Console.WriteLine(”最大公約數(shù)：0",i);4)staticvoidMain(stringargs)inti,j,k;floats=1.0f;for(i=2;i<11;i+)k=1;for(j=2;j<=i;j+)k+=j;s+=1.0f/k;Console.WriteLine("s=0",s);5)staticvoidMain(stringargs)Strings="a,b2>4AG6p("inti,n1=0,n2=0,n3=0,n4=0;for(i=0;i<s.Length;i+)if(si>=65&si<=90)n1+;if(si>=97&si<=122)n2+;if(si>=48&si<=57)n3+;n4=s.Length-n1-n2-n3;Console.WriteLine("大寫字母?jìng)€(gè)數(shù)：0；小寫字母?jìng)€(gè)數(shù)：1；數(shù)字個(gè)數(shù)：2；其余字符個(gè)數(shù)：3",n1,n2,n3,n4);staticvoidMain(stringargs)inti,s=1;for(i=0;i<5;i+)6)s=2*(s+1);Console.WriteLine("小猴子第一天摘了0個(gè)桃子",s);說(shuō)明：由最后一天往前推算。后一天吃了前一天桃子數(shù)量的一半多1個(gè)，剩余桃子數(shù)量是前一天桃子數(shù)量的一半減1，則，前一天的桃子數(shù)量是后一天的桃子數(shù)量加1的2倍。*第三章1.判斷題(1)v(2)X(3)V(4)V(5)V(6)X(7)V(8)X(9)X(10)V(11)V(12)V(13)V(14)X(15)V(16)V(17)X(18)V(19)V(20)X(21)X(22)V(23)V(24)V(25)X(26)X(27)X2.選擇題(I) C(2)B(3)C(4)D(5)C(6)B(7)D(8)C(9)A(10)A(II) B(12)A(13)D(14)B(15)C3. 分析下列程序的運(yùn)行結(jié)果(1) s=32,s1=32,s2=34x=11,y=21(2) x1=3,x2=4y1=1,y2=44. 編程題(1)classStudentpublicstringstudentid;publicstringstudentname;privatestringbirthplace;privateDateTimebirthdate;publicStudent(stringid,stringname)studentid=id;studentname=name;publicstringStudentIdgetreturnstudentid;setstudentid=value;publicstringStudentNamegetreturnstudentname;setstudentname=value;publicstringBirthPlacegetreturnbirthplace;setbirthplace=value;publicDateTimeBirthDategetreturnbirthdate;setbirthdate=value;publicintAgegetreturnDateTime.Now.Year-birthdate.Year+1;2)classPointpublicintx,y;publicPoint(intx1,inty1)x=x1;y=y1;publicstaticPointoperator+(Pointp1)returnnewPoint(p1.x+1,p1.y+1);publicstaticPointoperator-(Pointp1)returnnewPoint(p1.x-1,p1.y-1);publicstaticdoubleoperator-(Pointp1,Pointp2)returnMath.Sqrt(p2.x-p1.x)*(p2.x-p1.x)+(p2.y-p1.y)*(p2.y-p1.y);3)classPersonpublicstringname;publicstringsex;publicDateTimebirthdate;classTeacher:Personpublicstringworkid;publicDateTimebeginwork;publicdoublewage;publicstaticintnum;publicdoubleWorkYearsgetreturnDateTime.Now.Year-beginwork.YearpublicTeacher()num+;publicstaticintGetNum()returnnum;4)abstractclassAnimalpublicstringNameget;set;publicintColorget;set;publicabstractvoidShout();publicabstractvoidEat();classTiger:AnimalpublicoverridevoidShout()Console.WriteLine("老虎叫”)；publicoverridevoidEat()Console.WriteLine("老虎吃東西”)；classDuck:AnimalpublicvoidSwim()Console.WriteLine("游泳”)；publicoverridevoidShout()Console.WriteLine("嘎嘎”)；publicoverridevoidEat()Console.WriteLine("鴨子吃東西”)；5)publicinterfaceIShapedoublePerimeter()；doubleArea()；classCircle:IShapepublicdoubleRadiusget；set；publicCircle(doubler)Radius=r；publicdoubleArea()returnMath.PI*Radius*Radius；publicdoublePerimeter()return2*Math.PI*Radius；classRectangle:IShapepublicdoubleLengthget;set;publicdoubleHeightget;set;publicRectangle(doublel,doubleh)Length=l;Height=h;publicdoubleArea()returnLength*Height;publicdoublePerimeter()return2*(Length+Height);第四章1.判斷題(1)v(2)X(3)x(4)X(5)V(6)X(7)V(8)V(9)X(10)V(11)V(12)X(13)X(14)X(15)V2.選擇題(I) C(2)A(3)C(4)C(5)B(6)A(7)B(8)C(9)D(10)A(II) C(12)D(13)D(14)C(15)B(16)C(17)D(18)C(19)D(20)B3.編程題(1)新建一個(gè)Windows窗口應(yīng)用程序，在窗口上拖放一個(gè)標(biāo)簽label1和一個(gè)定時(shí)器timer1將timerl的Enabled屬性改成True。給窗口類添加一個(gè)私有字節(jié)類型字段D1,編寫timerl的Tick事件處理處理方法：privatebyteD1=0;privatevoidtimer1_Tick(objectsender,EventArgse)switch(D1)case0:label1.Left+=10;if(label1.Right>this.ClientSize.Width)D1=1;break;case1:label1.Top+=10;if(label1.Bottom>this.ClientSize.Height)D1=2;break;case2:label1.Left-=10;if(label1.Left<0)D1=3;break;case3:label1.Top-=10;if(label1.Top<0)D1=0;break;2. 新建一個(gè)Windows窗口應(yīng)用程序，按照運(yùn)行效果圖設(shè)計(jì)窗口界面。其中的運(yùn)算操作數(shù)輸入和結(jié)果顯示采用TextBox控件，名稱分別為textBoxl、textBox2和textBox3；運(yùn)算符選擇采用RadioButton控件，加減乘除分別為radioButtonl到radioButton4；“=”按鈕采用Button控件，名稱為buttonl，編寫buttonl的Click事件處理方法：privatevoidbutton1_Click(objectsender,EventArgse)doublev1,v2,v=0;v1=double.Parse(textBox1.Text);v2=double.Parse(textBox2.Text);if(radioButton1.Checked=true)if(radioButton2.Checked=true)if(radioButton3.Checked=true)if(radioButton4.Checked=true)textBox3.Text=v.ToString();v=v1+v2;v=v1-v2;v=v1*v2;if(v2!=0)v=v1/v2;3.利用4.6節(jié)知識(shí)，參考圖4-29設(shè)計(jì)具有菜單、工具欄和狀態(tài)欄的Windows窗口應(yīng)用程序。AA-T-第五章1. 判斷題(1)v(2)X(3)V(4)V(5)X(6)V(7)X2. 選擇題(1)A(2)無(wú)答案，應(yīng)該是TextReader(3)A(4)C(5)A(6)C3. 編程題創(chuàng)建Windows窗口用于程序，在窗口上放置一個(gè)Button控件，名稱為button1,編寫其Click事件處理方法：privatevoidbutton1_Click(objectsender,EventArgse)inti,j;int,a=newint3,3;int,b=newint3,3;int,c=newint3,3;strings1;stringss;FileStreamfs=newFileStream("d:data1.txt",FileMode.Open);StreamReadersr=newStreamReader(fs,Encoding.Default);StreamWritersw;BinaryWriterbw;for(i=0;i<3;i+)s1=sr.ReadLine();ss=s1.Split('');for(j=0;j<3;j+)ai,j=int.Parse(ssj);for(i=0;i<3;i+)s1=sr.ReadLine();ss=s1.Split('');for(j=0;j<3;j+)bi,j=int.Parse(ssj);sr.Close();fs.Close();for(i=0;i<3;i+)for(j=0;j<3;j+)ci,j=ai,j+bi,j;SaveFileDialogsfd=newSaveFileDialog();sfd.Filter="文本文件(*.txt)|*.txt"if(sfd.ShowDialog()=DialogResult.OK)fs=newFileStream(sfd.FileName,FileMode.OpenOrCreate);sw=newStreamWriter(fs,Encoding.Default);for(i=0;i<3;i+)for(j=0;j<3;j+)sw.Write(ci,j);sw.Write("");sw.Write("n");sw.Close();fs.Close();sfd.Filter="二進(jìn)制文件(*.bin)|*.bin"if(sfd.ShowDialog()=DialogResult.OK)fs=newFileStream(sfd.FileName,FileMode.OpenOrCreate);bw=newBinaryWriter(fs);for(i=0;i<3;i+)for(j=0;j<3;j+)bw.Write(ci,j);bw.Close();fs.Close();說(shuō)明：datal.txt文件中共9行整數(shù)，每行3個(gè)整數(shù)，每個(gè)數(shù)據(jù)之間以一個(gè)空格隔開。1.判斷題(1)V(2)X(3)X(4)X(5)V(6)V(7)V(8)X(9)X(10)V2.選擇題(1)C(2)D(3)C(4)A(5)B(6)C(7)B(8)D3.編程題創(chuàng)建Windows窗口應(yīng)用程序，在窗口上放置一個(gè)toolStrip控件，并在其中添加兩個(gè)組合框,名稱分別為toolStripComboBox1和toolStripComboBox2,給toolStripComboBox1添加選項(xiàng):短劃線、點(diǎn)劃線、雙點(diǎn)劃線、虛線、實(shí)線，給toolStripComboBox2添加選項(xiàng)：1、2、3、4。給窗口添加如下私有字段：privateGraphicsg1;privateDashStyledashstyle=DashStyle.Solid;privatefloatpenwidth=1;privatePenpen1;privateboolbeDraw=false;privatePointp1,p2;編寫comboBox1和comboBox2的SelectedIndexChanged事件處理方法：privatevoidcomboBox1_SelectedIndexChanged(objectsender,EventArgse)dashstyle=(DashStyle)comboBox1.SelectedIndex;privatevoidcomboBox2_SelectedIndexChanged(objectsender,EventArgse)penwidth=float.Parse(comboBox2.Text);編寫Form3的Load、MouseDown、MouseMove和MouseUp以及工具欄上兩個(gè)組合框的SelectedIndexChanged事件處理方法：privatevoidForm3_Load(objectsender,EventArgse)toolStripComboBox1.SelectedIndex=toolStripComboBox1.Items.Count-1;toolStripComboBox2.SelectedIndex=0;privatevoidForm3_MouseDown(objectsender,MouseEventArgse)pen1=newPen(Color.Red,penwidth);pen1.DashStyle=dashstyle;beDraw=true;p1=e.Location;g1=this.CreateGraphics();privatevoidForm3_MouseMove(objectsender,MouseEventArgse)if(beDraw=true)p2=e.Location;g1.DrawLine(pen1,p1,p2);p1=p2;privatevoidForm3_MouseUp(objectsender,MouseEventArgse)beDraw=false;privatevoidtoolStripComboBox1_SelectedIndexChanged(objectsender,EventArgse)dashstyle=(DashStyle)toolStripComboBox1.SelectedIndex;privatevoidtoolStripComboBox2_SelectedIndexChanged(objectsender,EventArgse)penwidth=float.Parse(toolStripComboBox2.Text);第七章1.判斷題(I) v(2)X(3)x(4)X(5)V(6)X(7)V(8)X(9)V(10)X(II) V(12)X(13)V(14)V(15)V(16)V2.選擇題(I) A(2)D(3)C(4)A(5)D(6)B(7)C(8)D(9)B(10)C(II) C12)C13)A14)B15)D16)D3.編程題(1)創(chuàng)建Windows窗口應(yīng)用程序，在窗口上放置兩個(gè)Button控件，名稱分別為button1和button2，再放置一個(gè)ComboBox控件和DataGridView控件，名稱分別為comboBoxl和dataGridView1。編寫button1的Click事件處理方法：privatevoidbutton1_Click(objectsender,EventArgse)OleDbConnectioncon=newOleDbConnection();OleDbCommandcom=newOleDbCommand();con.ConnectionString="Provider=microsoft.jet.oledb.4.0;datasource=d:aaa.mdb"con.Open();com.CommandType=CommandType.Text;com.CommandText="select*fromScorewherescore>80"com.Connection=con;OleDbDataReaderdr=com.ExecuteReader();comboBox1.Items.Clear();while(dr.Read()=true)if(dr.IsDBNull(dr.GetOrdinal("StudentID")=false)comboBox1.Items.Add(dr"StudentID");說(shuō)明：為了使用ADO.NET的0LEDB訪問(wèn)方式，需要添加下列引用：usingSystem.Data.OleDb;(2)界面與(1)相同。編寫button2的Click事件處理方法：privatevoidbutton2_Click(objectsender,EventArgse)OleDbConnectioncon=newOleDbConnection();OleDbCommandcom=newOleDbCommand();con.ConnectionString="Provider=microsoft.jet.oledb.4.0;datasource=d:aaa.mdb"con.Open();OleDbDataAdapterda=newOleDbDataAdapter("selectClassas班級(jí)，avg(Score)as平均成績(jī)fromScoregroupbyClass",con);DataSetds=newDataSet();da.Fill(ds,"平均成績(jī)表");dataGridViewl.DataSource=ds.Tables"平均成績(jī)表"(3) 參考7.7節(jié)的學(xué)生信息管理程序，編寫通訊錄管理程序，細(xì)節(jié)略。