c#程序设计教程第二版李春葆课后编程题答案

1、输入a,b求c = a + busing System;using ； namespace Proj2_1一class Programstatic void Main( string 口 args) int a, b, c;("a:");a =();("b:");b =();c = a + b;("a+b=0" , c);:4 Fermi0回-using System;using ;using ;using ;using ;using Proj2_2public partial class Form1 : Form public Fo

2、rm1() InitializeComponent();private void button1_Click( object sender, EventArgs e)一int a, b, c;a =; b =;c = a + b;=(c)； private void Form1_Load( object sender, EventArgs e)一private void textBox2_TextChanged( object sender, EventArgs e) 强制转换P38using System;using ;namespace Proj3_1一class Program stat

3、ic void Main( string 口 args) int i=65,i1,i2;double d = ,d1,d2;char c = 'A' ,c1,c2;("i=0:d5,d=1:f,c=2", i, d, c);i1 = (int )d;MainMainMainMainMainMainMainMainMainMainMainMainMainMainMainMainMainoString(); break ; case "button14" :oString();break ;case "button15"

4、:oString();break ;I JellZOE BSZOIZI SScase "button16" : oString(); break ; =; 模式窗体，无模式窗体调用using System;using ；using ； using ； using ；using Proj8_1public partial class Forml : Form public Form1()InitializeComponent();private void button1_Click( object sender, EventArgs e)Form myform = new F

5、orm1_1();();o = 1; ="王华"；stud.sex ="男"；stud0.rq =new DateTime(1980,2,10);stud0.sclass ="99091"stud1.no = 2; ="李强stud1.sex ="男"；stud1.rq =new DateTime(1981,10,4);stud1.sclass ="99101"stud2.no = 3; ="张丽stud2.s

6、ex ="女"stud2.rq =new DateTime(1980,3,2);stud2.sclass ="99091"stud3.no = 4; ="汪洋stud3.sex ="男"；stud3.rq =new DateTime(1980,1,5);stud3.sclass ="99101"stud4.no = 5; ="江华stud4.sex ="男"；I -|Z=1 |1:&皿工IllLalloKSLiJstud4.

7、rq =new DateTime(1980,3,10); stud4.sclass =stud5.no = 6; ="李英" ;stud5.sex =stud5.rq =new DateTime(1980,6,2); stud5.sclass =stud6.no = 7; ="胡军"stud6.sex =stud6.rq =new DateTime(1981,10,9); stud6.sclass =stud7.no = 8; ="刘驰"stud7.sex =stud7

8、.rq =new DateTime(1982,5,2); stud7.sclass =stud8.no = 9; ="宋仁"stud8.sex =stud8.rq =new DateTime(1980,8,3); stud8.sclass =stud9.no = 10; ="许兵"stud9.sex =stud9.rq =new DateTime(1980,11,8); stud9.sclass =o)i = i + 1; if (i >= 10) ("没有该学号的记录")；else&

9、quot;99091""女"；"99101""男"；"99091""女"；"99101""男"；"99101""男"；"99091"=studi.(); ame;=studi.sex;=studi.sclass;=studi.(); private void groupBox2_Enter( object sender, EventArgs e) 设计下拉菜单实现两个数的加，减，乘，除。

10、P207using System;using ;using ;using ;using ;using Proj9_1 public partial class Form2 : Form public Form2() InitializeComponent();private void addop_Click( object sender, EventArgs e) int n;n = + ;=();privatevoid subop_Click(object sender,EventArgs e)int n;=();object sender,EventArgs e)private void

11、mulop_Click(一int n; n = * ; =();privatevoid divop_Click(object sender,EventArgs e)int n;n = / ;= ();private void op_Click( object sender, EventArgs e) if ="" | = 0)=false ;else=true ;private void menuStrip1_ItemClicked( object sender, ToolStripItemClickedEventArgs e) 以下是弹出式菜单实现上题using Syst

12、em;using ;using ;using ;using ;using Proj9_1public partial class Form4 : Formpublic Form4()InitializeComponent();private void addop_Click( object sender, int n;n = +EventArgs e)J= ();private void subop_Click( object sender, int n;n = -EventArgs e)J= ();privatevoidmulop_Click(objectsender,EventArgse)

13、int n = *n;= ();private void divop_Click( object sender, EventArgs e)一int n; n = / ; =(); private void op_Opened( object sender, EventArgs e)一if ="" | = 0)=false ;else =true ;private void Form4_Load( object sender, EventArgs e) P215设计一个窗体，用于打开用户指定文件，并将其放到另外的同类文using System;using ;using ; u

14、sing ; using ; using Proj9_1 public partial class Form5 : Form public Form5() InitializeComponent();private void button1_Click( object sender, EventArgs e)一="» ;="RTF File(*.rtf)|*.RTF|TXT FILE(*.txt)|*.txt"();if !="") switchcase 1:tf类型break ;case 2:xt 类型,；break ;= true

15、 ;private void button2_Click( object sender, EventArgs e) = "RTF File(*.rtf)|*.RTF|TXT FILE(*.txt)|*.txt"if () =switchcase 1: tf 类型,;break ;case 2: xt 类型,;break ; private void Form5_Load( object sender, EventArgs e) =true ;=false ;设计一个窗体，显示节点及子节点功能P224using System;using ;using ;using ;usin

16、g ;using Proj9_1public partial class Form6 : Form public Form6()InitializeComponent();private void Form6_Load( object sender, EventArgs e)=imageListl; mageindex = 0;0.SelectedImageIndex = 0;0.("一年级")；0.Nodes0.ImageIndex = 1;0.Nodes0.SelectedImageIndex = 1;0.Nodes0.("0701 班");0.No

17、des0.Nodes0.ImageIndex = 2;0.Nodes0.Nodes0.SelectedImageIndex = 2;0.Nodes0.("0702 班");0.Nodes0.Nodes1.ImageIndex = 2;0.Nodes0.Nodes1.SelectedImageIndex = 2;0.("二年级")；0.Nodes1.ImageIndex = 1;0.Nodes1.SelectedImageIndex = 1;0.Nodes1.("0601 班");0.Nodes1.Nodes0.ImageIndex =

18、 2;0.Nodes1.Nodes0.SelectedImageIndex = 2;0.Nodes1.("0602 班");0.Nodes1.Nodes1.ImageIndex = 2;0.Nodes1.Nodes1.SelectedImageIndex = 2;"电子工程系")；();"豹子);0.(0.(0.(0.(0.("老虎");"北极熊”);"狼")；"大象");"犀牛")；"鱼类" );1.("鲨鱼");

19、1 .("热带鱼");1 .("金鱼");"鸟类" );2 .("天鹅");2 .("猫头鹰");2 .("翠鸟");private void treeView1_AfterSelect( object sender, TreeViewEventArgs e) string s;5 = imageList1;= imageList2;switch (s)case " 哺乳动物" :" 豹子" , 0);" 老虎" ,

20、 0);" 北极熊 " , 0);"狼 ", 0);" 大象" , 0);" 犀牛" , 0);break ;case " 鱼类 " :" 鲨鱼" , 0);" 热带鱼 " , 0);" 金鱼" , 0);break ;case " 鸟类 " :" 天鹅" , 0);" 猫头鹰 " , 0);" 翠鸟" , 0);break ;privatevoidmenu

21、1_Click(objectsender,EventArgse)privatevoidmenu2_Click(objectsender,EventArgse)privatevoidmenu3_Click(objectsender,EventArgse)private void menu4_Click( object sender, EventArgs e)绘制两个矩形，一个蓝色边框，一个红色边框。P254using System;using ;using ;using ;using ;using Proj10_2public partial class Form1 : Formpublic F

22、orm1()InitializeComponent();private void Form1_Paint( object sender, PaintEventArgs e) Graphics gobj=();Pen bluePen = new Pen, 5);Pen redPen = new Pen, 5);Rectangle myRectangle = new Rectangle (50, 50, 100, 80);(bluePen, 30, 20, 100, 80);(redPen, myRectangle);private void Form1_Load( object sender,

23、EventArgs e) 绘制两个填充饼形构成的椭圆。P254using System;using ;using ;using ;using ;using Proj10_2public partial class Form2 : Formpublic Form2()InitializeComponent();private void Form2_Paint( object sender, PaintEventArgs e) Graphics gobj = ();double PI = ;, 30, 30, 130, 80, 0, 300);, 30, 30, 130, 80, 0, -60);

24、private void Form2_Load( object sender, EventArgs e)绘制一个带边的填充椭圆P254using System;using ;using ;using ;usingusing ;using Proj10_2public partial class Form3 : Formpublic Form3()InitializeComponent();private void Form3_Paint( object sender, PaintEventArgs e) Graphics gobj = ();HatchBrush myBrush = new H

25、atchBrush , ;Pen myPen = new Pen, 8);(myPen, 20, 20, 150, 100);(myBrush, 20, 20, 150, 100);private void Form3_Load( object sender, EventArgs e)分别在窗体上画一个直线，一个圆，一个文本P254using System; using ； using ; using ; using ;using Proj10_2FormI画施1 画形状 画文本一public partial class Form5 :public Form5() InitializeComp

26、onent(); object sender,EventArgs e)Graphics gobj =();object sender,EventArgs e)Graphics gobj =();(30, 30, 100, 100);object sender, EventArgs e)private void button1_Click(一Pen myPen = new Pen (myPen, 30, 30, 120, 120);private void button2_Click( Pen myPen = new Pen (myPen,new Rectangleprivate void bu

27、tton3_Click(一Graphics gobj =();string drawString ="使用 DrawString 方法"；Font myFont = new Font ("黑体"，16);Brush b = new SolidBrushfloat x =;float y =;StringFormat myFormat = new StringFormat ();(drawString, myFont, b, x, y, myFormat); private void Form5_Load( object sender, EventArgs

28、 e) 在列表框中显示所有学生的学号，姓名，课程名和分数。按学号次序排歹限P349using System;using ； using ； using ； using ； using Proj13_2一public partial class Forml : Form public Form1() InitializeComponent();private void button1_Click( object sender, EventArgs e)string mystr,mysql;OleDbConnection myconn = new OleDbConnection (); mystr

29、 ="Provider = "+"Data Source = H:C#2005"=mystr;();OleDbCommanmycmd = new OleDbCommaind;mysql ="SELECT student.学号,student. 姓名，score.课程名，score.分数 FROM student,scoreWHERE student.学号=score.学号 ORDER BY student.学号”；=mysql;=myconn;OleDbDataReader myreader =();"学号t姓名t课程名t分数&quo

30、t;);"="与textBox1文本框绑定起来Binding mybinding2 = new Binding ("Text", mybs,"课程名")；Binding ("Text" , mybs,();Binding mybinding3 = new"分数")；private voidEventArgs e)button1_Click( object sender,if != 0)();utoSizeMode =11.AutoSizeMode =12.AutoSizeMode =();设计窗

31、体实现对score表所有记录通用查找和排序。P350using System;using using ;using ;using ;using ;using Proj13_2 public partial class Form5 : FormInitializeComponent();private void Form5_Load( object sender, EventArgs e)DataView mydv = new DataView(); public Form5()string mystr;OleDbConnection myconn = new OleDbConnection (

32、);DataSet myds = new DataSet ();DataSet myds1 = new DataSet ();DataSet myds2 = new DataSet ();DataSet myds3 = new DataSet ();mystr ="Provider = "+"Data Source = H:C#2005"=mystr;();OleDbDataAdapter myda = new OleDbDataAdapter ("SELECT * FROM score" , myconn);(myds,"

33、score");mydv = "score" .DefaultView;utoSizeMode =11 .AutoSizeMode =;2 .AutoSizeMode =;();"学号")；"课程名");"分数")；=true; =false=""“private void button1_Click( object sender, EventArgs e) string condstr ="" ;/ 以下根据用户输入求得条件表达式condstrif !="

34、;" )condstr =" 学号 Like '"+ +"%'" ;if !="" )if (condstr !="" )condstr = condstr +" AND 课程名 = '"+ +elsecondstr =" 课程名 = '" + +"'" ;=condstr;/ 过滤 DataView 中的记录private void button2_Click( object sender, EventA

35、rgs e) =""=""=""private void button3_Click( object sender, EventArgs e) string orderstr ="" ;/ 以下根据用户输入求得排序条件表达式orderstrif !="" )iforderstr = +" ASC" ;elseorderstr = +" DESC" ;=orderstr;/ X:'DataView中记录排序(1) |输入 a,b 求 c = a +

36、b固强制转换P38回赋值两同学信息数据，并在图中输出结果 P44(3) |声明枚举类型 color ,给两成员赋值，定 义三个变量，赋值运算输出相应值。P47(4) |位运算符运用P50回输出常用数据类型所用字节数P52回求字符串子串在主串的位置P56函ataTime 结构的使用 P59回设计一个控制台程序， 定义变量int a, b; float x , y。并求表达式(float ) ( a+b) /+(int)x%(int)y P60团设计一个控制台程序，定义变量 int a , b, c;并求表达式(+c-1 ) &b+c/2 P60回声明一个学生结构类型Stud ,包含学号，姓名，出生日期成员，定义 Stud结构的两个 学生变量S1, S2并赋值，求他们出售在星期 几及其相差天数P60回用if/if else语句显示用户输入数值的绝对值P62剑判断年份是否为闰年p63(9) |将用户输入的分数转换为等级ABCD输出P64恒口编写程序要求输入课程后显示相应学分 P65(12)判断输入的大于3的正整数是否为素数P70(12)用continue 语句对输入的正数求和，输入的负数忽略，每输入一个数，判断其正负， 负则结束循环，进入下一个数，正数则加到 总数上去P71 (13) |满足12 +22 +n2 <1000的最大的n