c#程序設(shè)計(jì)教程第二版李春葆課后編程題答案

1、C#程序設(shè)計(jì)教程第二版李春葆 課后編程題答案輸入 a,b 求 c = a + busing System;using System.Text;namespace Proj2_1class Programstatic void Main( string args)int a, b, c; Console .Write( "a:" );a = int .Parse( Console .ReadLine(); Console .Write( "b:" );b = int .Parse( Console .ReadLine(); c = a + b;Consol

2、e .WriteLine( "a+b=0" , c);using System;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;namespace Proj2_2public partial class Form1 : Formpublic Form1()InitializeComponent();EventArgs e)private void button1_Click( object sender, int a, b, c;a =Convert .

3、ToInt16(textBox1.Text);b =Convert .ToInt16(textBox2.Text);c = a + b; textBox3.Text = Convert .ToString(c);private void Form1_Load( object sender, EventArgs e)private void textBox2_TextChanged( object sender, EventArgs e) 強(qiáng)制轉(zhuǎn)換 P38using System;using System.Text;namespace Proj3_1class Programstatic voi

4、d Main( string args) int i=65,i1,i2;double d = 66.3456,d1,d2; char c = 'A' ,c1,c2;Console .WriteLine("i=0:d5,d=1:f,c=2", i, d, c);i1 = (int )d;/ 強(qiáng)制類型轉(zhuǎn)換d1 = i;/ 隱式類型轉(zhuǎn)換c1 = (char )i;/ 強(qiáng)制類型轉(zhuǎn)換Console .WriteLine("i1=0:d5,d1=1:f,c1=2", i1, d1, c1);i2 = c;/ 隱式類型轉(zhuǎn)換d2 = (int )d;/

5、強(qiáng)制類型轉(zhuǎn)換c2 = (char )d;/ 強(qiáng)制類型轉(zhuǎn)換Console .WriteLine("i2=0:d5,d2=1:f,c2=2", i2, d2, c2);賦值兩同學(xué)信息數(shù)據(jù)，并在圖中輸出結(jié)果 P44using System; namespace Proj3_2 class Program struct Studentpublicint xh;/ 學(xué)號(hào)publicstring xm;/ 姓名publicstring xb;/ 性別publicint nl;/ 年齡publicstring bh;/ 班號(hào)static voidMain( string args)Stu

6、dents1,s2;/ 定義兩個(gè)結(jié)構(gòu)類型變量s1.xh =101;s1.xm ="李明"s1.xb ="男"s1.nl = 20;s1.bh ="07001" ;Console.WriteLine("學(xué)號(hào) :0, 姓名:1, 性別:2, s1.bh);s2 = s1;/ 將結(jié)構(gòu)變量 s1賦給 s2類型聲明應(yīng)放在 Main函數(shù)的外面/年齡 :3,s1.xb, s1.nl班號(hào) :4" , s1.xh, s1.xm,s2.xh = 108;s2.xm = "王華 "Console .WriteLine

7、( s2.xb, s2.nl, s2.bh);"學(xué)號(hào) :0, 姓名:1, 性別:2, 年齡:3,班號(hào) :4" , s2.xh, s2.xm,聲明枚舉類型 color ，給兩成員賦值，定義三個(gè)變量賦值運(yùn)算輸出相應(yīng)值。 P47using System;using System.Text;namespace Proj3_3class Programenum Color Red=5, Green, Blue, White=1, Black static void Main( string args)Color c1, c2,c3;/ 類型聲明應(yīng)放在 Main函數(shù)的外面Console

8、 .WriteLine( "Red=0,Green=1,Blue=2,White=3,Black=4" Blue, Color .White, Color .Black);, Color .Red, Color .Green, Color .Console .WriteLine( "Red=0,Green=1,Blue=2,White=3,Black=4" een,( int ) Color .Blue,( int ) Color .White,( int ) Color .Black);c1 = Color .Red;c2 = c1 + 1;c3 =

9、c2 + 1;Console .WriteLine( "c1=0,c2=1,c3=2"Console .WriteLine( "c1=0,c2=1,c3=2",( int ) Color .Red,( int ) Color .Gr, c1, c2,c3);, ( int )c1, ( int )c2,( int )c3);位運(yùn)算符運(yùn)用 P50using System;using System.Text;namespace Proj3_4class Programstatic void Main( string args) byte b1, b2, b3

10、;b1 = 10;b2 =( byte ) b1;Console .WriteLine(b2);b3 = (byte )(b1 << 2);Console .WriteLine(b3); b1 = 3; b2 = 6;b3 = (byte )(b1 & b2);Console .WriteLine(b3);b3 = (byte )(b1 b2);Console .WriteLine(b3);b3 = (byte )(b1 | b2);Console .WriteLine(b3);輸出常用數(shù)據(jù)類型所用字節(jié)數(shù) P52using System;using System.Text;

11、namespace Proj3_5 class Programstatic void Main( string args)Console .WriteLine(Console .WriteLine(Console .WriteLine( Console .WriteLine("byte 類型所占字節(jié)數(shù) :0" , sizeof (byte );"char 類型所占字節(jié)數(shù) :0" , sizeof (char ); "int 類型所占字節(jié)數(shù) :0" , sizeof ( int );"float 類型所占字節(jié)數(shù) :0"

12、; , sizeof ( float );Console .WriteLine(Console .WriteLine("double 類型所占字節(jié)數(shù) :0""decimal 類型所占字節(jié)數(shù) :0"sizeof ( double ); sizeof ( decimal );求字符串子串在主串的位置 P56using System;using System.Text;namespace Proj3_6class Programstatic void Main( string args)String mstr,sstr;Console .Write( &quo

13、t; 輸入主串 :" ); mstr = Console .ReadLine();Console .Write( " 輸入子串 :" );sstr = Console .ReadLine();Console .WriteLine( " 主串長(zhǎng)度 =0, 子串長(zhǎng)度 =1" , mstr.Length, sstr.Length);if ( String .Compare(mstr, sstr) != 0)Console .WriteLine( " 位置 :0" , mstr.IndexOf(sstr); elseConsole

14、.WriteLine( " 兩個(gè)字符串相同 ");ataTime 結(jié)構(gòu)的使用 P59ng System; mespace Proj3_7class Programstatic void Main(string args)DateTime d1 = DateTime d2 = Console .WriteLine(i = d1.Year; j = d1.Month; k = d1.Day; h = d1.Hour; m = d1.Minute; s = d1.Second;DateTime .Now;DateTime(2009, 10, 1);,d1);new"d1

15、:0"/ 定義當(dāng)前日期時(shí)間變量/ 定義一個(gè)日期時(shí)間變量int int int int int intConsole .WriteLine( Console .WriteLine( Console .WriteLine( DateTime d3 = d1.AddDays(100);Console .WriteLine( "d3:0" ,d3);"d1:0"d2:0"年1 月2 日3 時(shí)4 分5 秒", i,j,k,h,m,s); ,d2);"相距時(shí)間 :0" ,d2 - d1);/d3 為d1的100 天后

16、的日期Console .WriteLine( DateTime .IsLeapYear(i);Console .WriteLine( DateTime .IsLeapYear(d2.Year);設(shè)計(jì)一個(gè)控制臺(tái)程序，定義變量 int a ，b；float x ， y。并求表達(dá)式（float ）（ a+b） /+（int）x%（int）y P60using System;using System.Text;namespace Proj3_8class Programstatic void Main( string args)int a = 2, b = 3;float x = 3.5f, y =

17、2.5f;int )x % ( int )y);c; 并求表達(dá)式（+c-1 ）&b+c/2Console .WriteLine( "0" , ( float )(a + b) / 2 + ( 設(shè)計(jì)一個(gè)控制臺(tái)程序， 定義變量 int a，b,P60using System;using System.Text;namespace Proj3_9class Programstatic void Main( string args) int a = 3, b = 4, c = 5;Console .WriteLine( "0" , (+c - 1) &a

18、mp; b + c / 2); 聲明一個(gè)學(xué)生結(jié)構(gòu)類型 Stud，包含學(xué)號(hào)，姓名，出生日期成員，定義Stud 結(jié)構(gòu)的兩個(gè)學(xué)生變量 S1，S2 并賦值，求他們出售在星期幾及其相 差天數(shù) P60using System;using System.Text; namespace Proj3_10 enum WeekDayhz 星期日 , 星期一 , 星期二 , 星期三 , 星期四 , 星期五 , 星期六 ;/ 結(jié)構(gòu)類型聲明應(yīng)放在 Main 函數(shù)的外面 / 學(xué)號(hào) xm; / 姓名DateTime birthday; / 出生日期class Programstruct Studint xh;stringp

19、ublicpublicpublicstatic void args)Main( string Stud s1, s2;s1.xh = 100; s1.xm =s2.xh = 200; s2.xm =int i = ( int )s1.birthday.DayOfWeek;" 李明 " ; s1.birthday =" 王麗 " ; s2.birthday =new DateTime(1985,10,18); new DateTime(1986,2,16);WeekDayhz)i);Console .WriteLine( "0 出生在 1&quo

20、t; ,s1.xm,(Console .WriteLine(Console .WriteLine("0 出生在 1" , s2.xm, ( WeekDayhz)i);"0 和1 相差2 天", s1.xm, s2.xm, s2.birthday - s1.birthday);P72輸入一組整數(shù)(以輸入 0 結(jié)束)分別輸出其中奇數(shù)和偶數(shù)之和using System;using System.Text;namespace Proj4_13class Programstatic void Main( string args)int n,s1=0,s2=0;do

21、n = int .Parse( Console .ReadLine();if (n%2=1)s1 += n;elses2 += n; while (n!=0);Console .WriteLine( " 奇數(shù)之和 =0" ,s1);Console .WriteLine( " 偶數(shù)之和 =0" ,s2);輸入正整數(shù) n，計(jì)算 s=1+(1+2)+(1+2+3)+ +(1+2+3+n)using System;using System.Text;namespace Proj4_14 class Programstatic void Main( string

22、args)int n,i,j,s=0;Console .Write( "n:" ); n = int .Parse( Console .ReadLine();for (i = 1; i <= n; i+)for (j = 1; j <= i; j+) s += j;Console .WriteLine( "s=0" , s); 輸出 n 階楊輝三角形， n不能大于 13using System;using System.Text;namespace Proj4_15class Programstatic void Main( string a

23、rgs)int i,j,c,n;Console .Write( "n:" ); n= int .Parse( Console .ReadLine();if (n>13)Console .WriteLine( " 輸入的數(shù)值太大！ "); elsenafor (i=0;i<=n-1;i+)for (j=1;j<15-i;j+)Console .Write( " " ); c=1;Console .Write( "0 " ,c);/ 每次循環(huán)顯示 2個(gè)空格for (j=1;j<=i;j+) c=

24、c*(i-j+1)/j;if (c<100)if (c<10) Console .Write( "0 " ,c); elseConsole .Write( "0 " ,c); elseConsole .Write( "0 " ,c);Console .WriteLine();/ 顯示 3個(gè)空格/ 顯示 2個(gè)空格/ 顯示 1個(gè)空格用/4 = 1-1/3+1/5-1/7+ +1/(4n-3)-1/ ( 4n-1 )ng System;ng System.Text;mespace Proj4_16class Programsta

25、tic void Main( string args)double pi=0.0;int i;for (i=1;i<=2000;i+) if (i%2=1) pi=pi+1.0/(2*i-1);elsepi=pi-1.0/(2*i-1);pi=4*pi;Console .WriteLine( " =0" , pi);輸出三個(gè)數(shù)，其數(shù)值剛好等于其每個(gè)數(shù)字立方和( 153=13+53+33)using System;using System.Text;namespace Proj4_17class Program static void Main( string args

26、)int i, n, a, b, c;for (i = 100; i <= 999; i+) n = i; c = n % 10; n = n / 10; b = n % 10; n = n / 10; a = n;if (a * a * a + b * b * b + c * c * c = i) , a, b, c,a*a*a+b*b*b+c*c*c);Console .WriteLine( "0 1 2 = 3" /Console.Write("0 ", i); Console .WriteLine();假設(shè)十個(gè)整數(shù)用一個(gè)一維數(shù)組存放，求其最

27、大值和次大值using System;using System.Text;namespace Proj5_6class Programstatic void Main( string args)int a = new int 101,8,3,4,7,9,6,10,2,5; int n=10,max1,max2,i;max1=a0>a1?a0:a1; max2=a0>a1?a1:a0;for (i=2;i<n;i+)if (max1<ai) max2=max1; max1=ai;Console .WriteLine( "max1=0,max2=1" ,

28、max1,max2); 用一個(gè)二維數(shù)組存放 5個(gè)考試 4門功課的考試成績(jī)， 求每個(gè)考生的平均成績(jī)usingusing using usingSystem;System.Collections;System.Text;namespace Proj5_7 class Programstatic void Main( string args)const int Max = 5;int Ave = new int Max;int , grade=88,75,62,84,96,85,75,92,68,63,72,78,95,89,76,98, 76,65,72,63;for (int i=0; i<

29、;Max; i+)/ 考生數(shù)/ 定義一個(gè)一維數(shù)組存儲(chǔ)考生的總成績(jī) / 定義二維數(shù)組存儲(chǔ)考生成績(jī)for (int j=0; j<4; j+)/ 累加考生成績(jī)Avei += gradei,j;for ( int k = 0; k < Max; k+)Console .WriteLine( "考生0平均成績(jī) =1 " ,k+1, Avek/4.0); 用兩個(gè)一維數(shù)組分別存放 5 個(gè)學(xué)生的學(xué)號(hào)和姓名， 分別按學(xué)號(hào)好姓名進(jìn) 行排序，輸出排序后結(jié)果using System;using System.Text;namespace Proj5_8class Programcon

30、st int Max = 5;static void disp( int no, string name, string str)Console .WriteLine(str);Console .Write( " 學(xué)號(hào) :t" );for ( int i = 0; i < no.Length; i+)Console .Write( "0t" ,noi);Console .WriteLine();Console .Write( " 姓名 :t" );for ( int i = 0; i < name.Length; i+)C

31、onsole .Write( "0t" , namei);Console .WriteLine();static void Main( string args)int no = new int 2, 4, 5, 1, 3;string name = new string "Smith" , "John" , "Mary" , "Cherr" , "Tomn" ; disp(no, name," 排序前： ");Array .Sort(no, name);d

32、isp(no, name," 按學(xué)號(hào)排序后： ");Array .Sort(name, no);disp(no, name," 按姓名排序后： ");計(jì)算器using System;using System.ComponentModel;using System.Data;using System.Drawing;namespace Prj8_3 public partial class Form1 : Formprivate string s; private double x, y; private Button btn; public Form1(

33、) InitializeComponent(); private void Form1_Load( object sender, EventArgs e)textBox1.Text = "" ; label1.Text = "" ;private void buttond_Click( object sender, EventArgs e) btn = ( Button )sender; textBox1.Text = textBox1.Text + btn.Text;private void buttonop_Click( object sender,

34、 EventArgs e) btn = ( Button )sender; /MessageBox.Show(btn.Name, " 信息提示 ", MessageBoxButtons.OK); if (btn.Name!= "button12" ) / 用戶不是單擊“ =”命令按鈕x =Convert .ToDouble(textBox1.Text);textBox1.Text = "" ;s = btn.Name;/ 保存用戶按鍵label1.Text = x.ToString(); else / 用戶單擊“ =”命令按鈕 if

35、(label1.Text = "" )MessageBox.Show( " 輸入不正確 !" , " 信息提示 ", MessageBoxButtons .OK); else y = Convert .ToDouble(textBox1.Text);switch (s) case "button13" : / 用戶剛前面單擊“ +”命令按鈕 textBox1.Text = (x + y).ToString();break ;case "button14" : / 用戶剛前面單擊“ - ”命令按鈕

36、 textBox1.Text = (x - y).ToString();break ;case "button15" : / 用戶剛前面單擊“×”命令按鈕 textBox1.Text = (x * y).ToString();break ;case "button16" : / 用戶剛前面單擊“÷”命令按鈕 if (y = 0)MessageBox.Show( "除零錯(cuò)誤 !" , " 信息提示 " , MessageBoxButtons .OK);else textBox1.Text = (x

37、 / y).ToString();break ; label1.Text = textBox1.Text;模式窗體，無(wú)模式窗體調(diào)用using System;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;namespace Proj8_1public partial class Form1 : Formpublic Form1()InitializeComponent();private void button1_Click( object sender, EventArg

38、s e) Form myform = new Form1_1();myform.ShowDialog(); / 以模式窗體方式調(diào)用 private void button2_Click( object sender, EventArgs e) Form myform = new Form1_2();myform.Show(); / 以無(wú)模式窗體方式調(diào)用private void Form1_Load( object sender, EventArgs e)private void Form1_Load_1( object sender, EventArgs e) 窗體設(shè)計(jì)using System

39、;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;namespace Proj8_2public partial class Form1 : Formprivate int n=0;public Form1()InitializeComponent();private void button1_Click( object sender, Form2 child = new Form2(); child.MdiParent = this ; child.Show();n+;c

40、hild.Text ="第" + n + "個(gè)子窗體 "private void button2_Click( object sender, EventArgs e)EventArgs e)MdiLayout .ArrangeIcons);private void button3_Click( object sender, EventArgs e) private void button4_Click( object sender, EventArgs e)private void button5_Click( object sender, EventA

41、rgs e) private void Form1_Load( object sender, EventArgs e) 用戶登錄 P200using System;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;namespace Proj8_4public partial class Form1 : Formint n = 0;/ 保存用戶錯(cuò)誤輸入的次數(shù)public Form1()InitializeComponent();private void button1_Cli

42、ck( object sender, EventArgs e)if (textBox1.Text = "1234" && textBox2.Text = "1234" )MessageBox.Show( " 用戶名 / 口令正確 ");this .Close();/ 調(diào)用其他程序elseif (n<3)MessageBox.Show( " 用戶名 /口令錯(cuò)誤 ,再次輸入 ");n+;elseMessageBox.Show( " 已經(jīng)錯(cuò)誤輸入三次，退出 "); this .C

43、lose();private void Form1_Load( object sender, EventArgs e)中華人民共和國(guó)成立 60 周年。字體，大小，粗體P200using System;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;namespace Proj8_4public partial class Form2 : Formpublic Form2()InitializeComponent();private void rbutton1_Checked

44、Changed( object sender, EventArgs e) Font f = new Font (" 宋體 textBox1.Font = f;private void rbutton2_CheckedChanged( object sender, EventArgs e) Font f = new Font (" 楷體 = f;= "楷體 _GB2312"private void rbutton3_CheckedChanged( object sender, EventArgs e)Font f = 10, = f;private voi

45、d rbutton4_CheckedChanged( object sender, EventArgs e) Font f = 16, = f;private void checkBox1_CheckedChanged( object sender, EventArgs e) if (checkBox1.Checked).Bold);.Regular);Font f = = f;elseFont f = = f;private void Form2_Load( object sender, EventArgs e)列表框選擇乘數(shù)進(jìn)行乘法運(yùn)算 P200using System;using Sys

46、tem.ComponentModel;using System.Data;using System.Drawing;using System.Text;namespace Proj8_4 public partial class Form3 : Formint a=0, b=0;public Form3() InitializeComponent();private void Form3_Load( object sender, EventArgs e) listBox1.Items.Add("12" );listBox1.Items.Add("10"

47、);listBox1.Items.Add("5" );listBox1.Items.Add("8" );listBox1.Items.Add("22" );listBox1.Items.Add("25" );listBox1.Items.Add("9" );listBox2.Items.Add("9" );listBox2.Items.Add("15" );listBox2.Items.Add("20" );listBox2.Items

48、.Add("32" );listBox2.Items.Add("18" );listBox2.Items.Add("5" );listBox2.Items.Add("7" );listBox2.Items.Add("32" );private void listBox1_SelectedIndexChanged( object sender, EventArgs e) a =int .Parse(listBox1.Text);private void listBox2_SelectedIndex

49、Changed( object sender, EventArgs e) b =int .Parse(listBox2.Text);"0 × 1=2" ,a,b,a*b); private void listBox3_SelectedIndexChanged( object sender, EventArgs e) 在組合框輸入新項(xiàng)時(shí)， 自動(dòng)添加到該組合框列表中并給相應(yīng)提示。 P200using System;using System.ComponentModel;using System.Data;using System.Drawing;using Syste

50、m.Text;namespace Proj8_4public partial class Form4 : Formpublic Form4()InitializeComponent();private void Form4_Load( object sender, EventArgs e) comboBox1.Items.Add(" 北京 ");comboBox1.Items.Add(" 上海 ");comboBox1.Items.Add(" 天津 ");comboBox1.Items.Add(" 廣州 ");co

51、mboBox1.Items.Add(" 武漢 ");comboBox1.Items.Add(" 沈陽(yáng) ");comboBox1.Items.Add(" 合肥 ");comboBox1.Items.Add(" 長(zhǎng)沙 ");comboBox1.Items.Add(" 重慶 "); private void comboBox1_KeyPress( object sender, KeyPressEventArgs e) if (e.KeyChar = 13)/ 按 Enter 鍵后判斷=" 你

52、的輸入已在組合框！ "else =" 你的輸入新項(xiàng)已添加到組合框中！ " private void comboBox1_SelectedIndexChanged( object sender, EventArgs e)MessageBox.Show( string .Format( " 你選擇了 '0' 項(xiàng) ",comboBox1.Text);存入十個(gè)學(xué)生記錄，根據(jù)用戶選定學(xué)號(hào)顯示學(xué)生記錄。 P200using System;using System.ComponentModel;using System.Data;using

53、System.Drawing;using System.Text;namespace Proj8_4public partial class Form5 : Formstruct StudTypepublic int no;public string name;public string sex;public string sclass; public DateTime rq;StudType stud = new StudType 10; / 定義一個(gè)結(jié)構(gòu)類型的數(shù)組 public Form5()InitializeComponent();private void Form5_Load( ob

54、ject sender, EventArgs e)/ 給定義的數(shù)組賦初值stud0.no = 1; =" 王華 " stud0.sex ="男"stud0.rq =new DateTime (1980,2,10); stud0.sclass ="99091" ;stud1.no = 2; =" 李強(qiáng) " stud1.sex ="男"stud1.rq =new DateTime (1981,10,4); stud1.sclass ="99101

55、" ;stud2.no = 3; =" 張麗 " stud2.sex ="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; =" 江華 " stud4.sex ="男"stud4.rq =new DateTime (1980,3,10); stud4.sclass ="990