VB程序设计教程第3版课后实验答案.docx

1、VB程序设计教程第3版课后实验答案实验AA1Private Sub Command1_Click() Label3 = Text1End SubA2Private Sub Form_Load() Timer1.Interval = 0End SubPrivate Sub Command1_Click() 自动 Timer1.Interval = 200End SubPrivate Sub Command2_Click() 手动 Timer1.Interval = 0 Call MyMoveEnd SubPrivate Sub Timer1_Timer() Call MyMoveEnd SubS

2、ub MyMove() Label1.Move Label1.Left - 50 If Label1.Left 0 Then Label1.Left = Form1.WidthEnd SubA3Private Sub Form_Click() Text1 = Val(Text1) + 1End SubPrivate Sub Form_Load() Text1 = 0End SubA4Private Sub Form_Click() Caption = 单击窗体，改变图片 Picture = LoadPicture(App.Path + n_015.bmp) Print 欢迎使用VBEnd Su

3、bPrivate Sub Form_DblClick() Cls Caption = 双击窗体，卸去图片 Picture = LoadPicture() End SubPrivate Sub Form_Load() Caption = 装入窗体 Picture = LoadPicture(App.Path + n_016.bmp) Print 装入图End SubPrivate Sub Form_Resize() 该事件的作用窗体始终与图一样大 Caption = 窗体大小不变 Form1.Width = 260 * 16 260是Tongji-2.bmp图的宽度，象素单位 Form1.Hei

4、ght = 260 * 16 + 200 260是图的高度，象素单位，200是窗体的标题栏高度End SubA5Sub Command1_Click() Text1.FontName = 隶书 Text1.FontSize = 25End SubSub Command2_Click() Text2.Text = Text1.SelText Text2.FontName = Text1.FontName Text2.FontSize = Text1.FontSizeEnd Sub实验BB1Private Sub Command1_Click() Text2 = Format(5 / 9 * (V

5、al(Text1) - 32), 0.00)End SubPrivate Sub Command2_Click() Text1 = Format(9 / 5 * Val(Text2) + 32, 0.00)End Sub或Private Sub Command1_Click() Dim f!, c! 声明两个变量 f = Val(Text1) c = 5 / 9 * (f - 32) Text2 = Format(c, 0.00) 保留两位小数End SubPrivate Sub Command2_Click() Dim ff!, cc! 声明两个变量 cc = Val(Text2) ff =

6、 9 / 5 * cc + 32 Text1 = Format(ff, 0.00) 保留两位小数End SubB2Private Sub Command1_Click() Label2 = Format(Val(Text1) * Val(Text1) * 3.14, 0.00)End SubPrivate Sub Command2_Click() Label3 = Format(Val(Text1) * 3.14 * 2, 0.00)End SubPrivate Sub Text1_LostFocus() If Not IsNumeric(Text1.Text) Then MsgBox 输入有

7、非数字字符，请重新输入, , 警告 Text1.Text = Text1.SetFocus End IfEnd Sub或Private Sub Command1_Click() Label2 = Format(Val(Text1) * Val(Text1) * 3.14, 0.00)End SubPrivate Sub Command2_Click() Label3 = Format(Val(Text1) * 3.14 * 2, 0.00)End SubPrivate Sub Text1_KeyPress(KeyAscii As Integer) If KeyAscii = 13 Then I

8、f Not IsNumeric(Text1.Text) Then Text1.Text = End If End IfEnd SubB3Private Sub Command1_Click() n = Int(Log(2) / Log(1.008) + 1) Label1 = n & 年后人数超过26亿End SubB4Private Sub Command1_Click() Dim x, dx, cd x = Text1.Text dx = UCase(x) cd = Len(x) Print 大写字母为:; dx Print 字符串长度为:; cdEnd SubB5Private Sub

9、Command1_Click() Text1 = Int(Rnd * 900 + 100)End SubPrivate Sub Command2_Click() Dim x%, x1%, x2%, x3% x = Val(Text1) x1 = x Mod 10 分离出的个位数 x2 = (x Mod 100) 10 分离出的十位数 x3 = x 100 分离出的百位数 Label1 = x1 * 100 + x2 * 10 + x3End SubB6Private Sub Form_Click() Label1 = Left(Text1, 11) Label2 = Mid(Text1, 12

10、, 6) Label3 = Right(Text1, 5)End SubB7Private Sub Command1_Click() Print For i = 1 To 5 Print Tab(15 - i * 2); String(2 * i - 1, ); Spc(18 - 4 * (i - 1); String(2 * i - 1, ) Next iEnd SubPrivate Sub Command2_Click() ClsEnd Sub进一步要求：Private Sub Command1_Click() Print For i = 1 To 5 Print Tab(15 - i *

11、 2); String(2 * i - 1, ); String(10 - (2 * i - 1), ); String(2 * i - 1, ) Next iEnd SubPrivate Sub Command2_Click() ClsEnd SubB8Private Sub Form_Click()x = Val(InputBox(输入一正实数, 计算, 0)pf = Format(x * x, 0.000)pfg = Format(Sqr(x), 0.000)lf = Format(x * x * x, 0.000)lfg = Format(x (1 / 3), 0.000)Print

12、平方为:; pf; Space(5); 平方根为:; pfg; Space(5); 立方为:; lf; Space(5); 立方根为:; lfgEnd Sub实验CC1Private Sub Form_Click()Dim x!, y!x = Val(InputBox(输入x的值)If x 1000 Theny = xElseIf x 2000 Theny = 0.9 * xElseIf x 3000 Theny = 0.8 * xElsey = 0.7 * xEnd IfPrint yEnd SubC2Private Sub Form_Click()Dim x!, y!x = Val(Inp

13、utBox(输入上网时间)If x 10 Theny = 30ElseIf x 150 Theny = 150End IfPrint yEnd SubC3Private Sub Command1_Click() Dim x!, y!, z! x = InputBox(input x) y = InputBox(input y) z = InputBox(input z) Print x y z Print 排序前; x; ; y; ; z If x y Then t = x: x = y: y = t If x z Then t = x: x = z: z = t If y z Then t

14、= y: y = z: z = t Print 排序后 & x & & y & & zEnd SubPrivate Sub Command2_Click() Dim x!, y!, z! x = InputBox(input x) y = InputBox(input y) z = InputBox(input z) Print x y z Print 排序前; x; ; y; ; z If x y Then t = x: x = y: y = t If y z Then t = y: y = z: z = t If x a(i + 1) Thenz = a(i + 1)a(i + 1) =

15、a(i)a(i) = zEnd IfNext iPicture2.Print a(0)Picture2.Print a(1)Picture2.Print a(2)End SubC5Private Sub Text2_LostFocus() Dim m%, n%, y% m = Val(Text1) n = Val(Text2) If n Mod 2 0 Then MsgBox (脚数必定为偶数) Text2 = Text2.SetFocus Else y = n / 2 - m If y 0 Then Text4 = Format(-b + Sqr(de) / t, 0.00) Text5 =

16、 Format(-b - Sqr(de) / t, 0.00)Else Text4 = Format(-b / t, 0.00) & + & Format(Sqr(Abs(de) / t, 0.00) & i Text5 = Format(-b / t, 0.00) & - & Format(Sqr(Abs(de) / t, 0.00) & iEnd IfEnd SubPrivate Sub Command2_Click()Text1 = Text2 = Text3 = Text4 = Text5 = End SubC7Private Sub Text3_LostFocus() Select

17、Case Trim(Text3) Case + Text4 = Val(Text1) + Val(Text2) Case - Text4 = Val(Text1) - Val(Text2) Case * Text4 = Val(Text1) * Val(Text2) Case / If Val(Text2) = 0 Then MsgBox 分母为零，重新输入 Text2 = Text2.SetFocus Else Text4 = Val(Text1) / Val(Text2) End If End SelectEnd SubC8Private Sub Text1_LostFocus() Sel

18、ect Case Trim(Text1) Case 1 Text2 = Monday Case 2 Text2 = Tuesday Case 3 Text2 = Wednesday Case 4 Text2 = Thursday Case 5 Text2 = Friday Case 6 Text2 = Saturday Case 7 Text2 = Sunday Case Is 7, Is 7 Or Text1 1 Then MsgBox 数字为17，重新输入 Text1 = Text1.SetFocusElse Text2 = Choose(Text1, Monday, Tuesday, W

19、ednesday, Thursday, Friday, Saturday, Sunday)End IfEnd Sub实验DD1Private Sub Form_Click() For i = 1 To 9 Print Tab(10 - i); String(2 * i - 1, Trim(Str(i) Next iEnd SubD2Private Sub Form_Click() For i = 1 To 10 Step 1 Print Tab(i); String(20 - 2 * i), Chr(64 + i) Next iEnd SubD3Private Sub Command1_Cli

20、ck()Dim s!, t!, i&s = 1t = 1For i = 1 To 100000t = t + is = s + 1 / tIf 1 / t 0.00001 Then Exit ForNext iPrint For结构; s, i; 项End SubD4Private Sub Command1_Click()Dim n&, pi#, i&n = InputBox(输入n值)pi = 2For i = 1 To n pi = pi * (2 * i) / (2 * i - 1) * (2 * i) / (2 * i + 1)Next iPrint 当n= & n & 时，pi=;

21、piEnd SubD5Private Sub Form_Click() Dim s!, t!, i!, a%, n% a = Int(Rnd * 9 + 1) n = Int(Rnd * 6 + 5) t = 0: s = 0 Print a=; a, n=; n For i = 1 To n t = t * 10 + a s = s + t Print t; Next i Print Print s=; sEnd SubD6Private Sub Command1_Click()Dim s As Integers = 0For i = 1 To 9 For j = 0 To 9 For k

22、= 0 To 9 s = i * 100 + j * 10 + k If s = i 3 + j 3 + k 3 Then Print s End If Next k Next jNext iEnd SubPrivate Sub Command3_Click()formd6.Hidemain.ShowEnd SubD7Private Sub Command1_Click() Dim a!, x0!, x1! a = 27 x0 = 2 i = 0 Do i = i + 1 x1 = 2 * x0 / 3 + a / (3 * x0 * x0) If Abs(x1 - x0) Max Then

23、Max = a(i) If a(i) Min Then Min = a(i) Avg = Avg + a(i) Next i Avg = Avg / 10 Print Print Max=; Max; Min=; Min; Avg=; AvgEnd SubE2Private Sub Form_Click() Dim a a = Array(56, 78, 98, 88, 76, 78) For i = 0 To 5 Print String(a(i) 5, ); a(i) Print Next iEnd SubE3Dim a%(19)Private Sub Command1_Click()Picture1.Cls For i = 0 To 19 a(i) = Int(Rnd * 101) Picture1.Print a(i); ; If (i + 1) Mod 4 = 0 Then Picture1.Print Next iEnd SubPrivate Sub