《Visual-Basic程序设计基础》课后习题参考答案.doc

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第1章 Visual Basic 6.0程序设计概述
一、判断题
1．√ 2．√
3．× 说明：同类控件（如两个标签）相互重叠，设计时可以设置“置前”、“置后”属性。
4．√ 5．× 6．√ 7．× 8．√ 9．√ 10．× 11．√ 12．√
13．× 14．√ 15．× 16．√ 17．√ 18．√ 19．√ 20．√
二、选择题
1. C 2. B 3．D 4．C 5．B 6．A 7．D 8．A 9．B 10．A 11．C 12．D
三、填空题
1．对象、事件 2．属性、方法、事件 3．控件、屏幕（Screen）
4．对象 5．Left、Top 6．属性、<对象名>.<属性名>=<表达式>
7．网格 8．F orm1
9．Load或Initialize或Resize或Activate（自动执行的先后顺序也按此排列）
10．Activate、Deactivate
四、程序设计题
程序1．界面设计参看图10-1、10-2以及表10-1。
表10-1 实例2各控件的主要属性设置
控件
属性（属性值）
属性（属性值）
标签控件1
Name(Label1)
Caption("我的第一个VB程序")
标签控件2
Name(Label2)
Caption("请输入你的姓名")
FontUnderLine(True)
FontItalic(True)
命令按钮1
Name(Command1)
Caption("确定(&O)")
命令按钮2
Name(Command2)
Caption("结束(&X)")
过程设计如下：
Private sub Form_Click()
Command2.Enabled = False
Een Sub
Private Sub Command1_Click()
Label2.Visible = False
Label1.Caption = Text1.Text + ": 欢迎使用" + Label1.Caption
Text1.Visible = False
Command1.Enabled = False: Command2.Enabled = True
End Sub
Private Sub Command2_Click()
End
End Sub
程序2．界面设计略，过程设计如下：
Private Sub Command1_Click() '字体变大
Form1.FontSize = Form1.FontSize + 3
Form1.Cls: Print "欢迎使用VB"
End Sub
Private Sub Command2_Click() '字体变小
Form1.FontSize = Form1.FontSize - 3
Form1.Cls: Print "欢迎使用VB"
End Sub
Private Sub Command3_Click() '字体加粗
Form1.FontBold = True
Form1.Cls: Print "欢迎使用VB"
End Sub
Private Sub Command4_Click() '字体不加粗
Form1.FontBold = False
Form1.Cls: Print "欢迎使用VB"
End Sub
运行时，不得连续、过多次单击“字体变小”按钮，因为当FontSize属性值小于0会产生适时错误。
程序3．界面设计略，过程设计如下（窗体Height值的计量包括标题、边框，而ScaleHeight值仅与窗体有效绘图区域的高度有关）：
Private Sub Form_Load()
Text1.Text = "Visual Basic 程序设计"
End Sub
Private Sub Form_Resize()
Text1.Top = 0: Text1.Left = 0
Text1.Width = Form1.ScaleWidth/2 '用 Form1.ScaleWidth效果优于用Form1. Width
Text1.Height = Form1.ScaleHeight/2 '用 Form1.ScaleHeight优于用Form1. Height
Command1.Top = Form1.ScaleHeight - Command1.Height
Command1.Left = Form1.ScaleWidth - Command1.Width
End Sub
第2章 程序设计基础
一、判断题
1．√ 2．× 3．× 4．× 5．√ 6．× 7．√ 8．√ 9．√ 10．×
二、选择题
1．B 2．D 3．A 4．C 5．C 6．B 7．A 8．D 9. C 10．A
三、填空题
1．String 2．4 3．"aaa" 4．145 5．6 6．3 7．18 8．False
9．(x Mod 10) * 10 + x \ 10 10．10 + Int( Rnd * 90 ) 11．a * b Mod c
12．Log(x)+Sin(3.141593/6) 13．Const PI=3.1415926 14．日期 15．Int(x)+1
四、程序设计题
程序1．界面设计略，过程设计如下：
方法一、用文本框控件输入圆的半径
Private Sub Command1_Click()
Dim x As Single
x = Text1.Text
Label1.Caption = x * x * 3.141593
End Sub
方法二、用InputBox函数输入圆的半径
Private Sub Command1_Click()
Dim x As Single '若要求计算结果具有15位有效位数，声明x为Double类型
x = InputBox("r=","输入圆的半径")
Label1.Caption = x * x * 3.141593
End Sub
程序2．略。
第3章 结构化程序设计与数组
一、判断题
1．√ 2．× 3．√ 4．× 5．√ 6．× 7．× 8．√ 9．× 10．√
二、选择题
1．A 2．D 3．C 4．C 5．D 6．B
三、填空题
1．If x>y Then t=y: y=x: x=t 2．IS
3．For i = 0 to 9: B(i) = InputBox("B(" & i & ")="): Next i
4．Dim 5．String 6．8
四、程序阅读题（写出下列程序的运行结果）
程序1. 0 5 程序2. 20 程序3. 2 4 7 11 16
程序4. 1 4 9 16 25
程序5. 程序6.
五、程序填空题
1．（1）q * i （2）s + p * i / q （3）Next i
2．（1）r = 0 （2）m Mod n
3．（1）i + j - 1 （2）7 - i （3）Print
4．（1）10 + Int(Rnd * 90) （2）i + 1 To 30 （3）a(i)=a(j) （4）a(i) Mod 2 = 1
六、程序设计题
程序1．界面设计略，过程设计如下：
Private Sub Form_Click()
Dim x As Integer, y As Integer, z As Integer
Dim max As Integer, midd As Integer, min As Integer
x = InputBox("请输入x的值：")
y = InputBox("请输入y的值：")
z = InputBox("请输入z的值：")
If x > y Then max = x Else max = y
If z > max Then max = z
If x < y Then min = x Else min = y
If z < min Then min = z
midd = x + y + z - max - min
Print max; midd; min
End Sub
程序2．界面设计略，过程设计如下：
Private Sub Form_Click()
Dim x As Single, y As Single
x = InputBox("请输入x的值：")
If x > 3 Then
y = x + 3
ElseIf x >= 1 Then
y = x * x
ElseIf x > 0 Then
y = Sqr(x)
Else
y = 0
End If
Print y
End Sub
程序3．界面设计略，过程设计如下：
Private Sub Form_Click()
Dim i As Integer, j As Integer
For i = 1 To 9
For j = 1 To 9
Print Tab((j - 1) * 4); i * j;
Next j
Print
Next i
End Sub
程序4．界面设计略，过程设计如下：
Private Sub Form_Click()
Dim x As Single, s As Single, t As Single
Dim i As Integer, n As Integer
x = InputBox("请输入x的值：")
n = InputBox("请输入n的值：")
t = x / 2: s = t
For i = 3 To n
t = t * x / i
s = s + t
Next i
Print s
End Sub
程序5．界面设计略，过程设计如下：
Private Sub Form_Click()
Dim e As Single, t As Single, i As Integer
e = 2: t = 1: i = 1
While t >= 0.0001
i = i + 1: t = t / i: e = e + t
Wend
Print e
End Sub
程序6．界面设计略，过程设计如下：
Option Base 1
Private Sub Form_Click()
Dim n As Integer, a(9, 9) As Integer, i As Integer, j As Integer
On Error GoTo k '下列代码中若出现错误，转到标号为K的语句执行。
n = InputBox("请输入n，0<n<10")
For i = 1 To n: a(i, 1) = 1: a(i, i) = 1: Next i
For i = 3 To n
For j = 2 To i - 1
a(i, j) = a(i - 1, j - 1) + a(i - 1, j)
Next j, i
For i = 1 To n
Print Tab(30 - 2 * i);
For j = 1 To i
Print Space(4 - Len(Trim(Str(a(i, j))))); Trim(Str(a(i, j)));
Next j
Print
Next i
Exit Sub
k: MsgBox "输入n值小于1或大于10，数组下标超界。"
End Sub
第4章 函数与过程
一、判断题
1．× 2．√ 3．× 4．× 5．√ 6．× 7．× 8．√
二、填空题
1．按地址传送 2．b() As Long 3．6 4．按值传递 5．按地址传递
6．Public x As Single 7．Static x As Integer 8．Form2.y
三、程序阅读题（写出下列程序的运行结果）
程序1. s = 2 程序2. 1 程序3. 1 1 2 1 1 2 1 2 2 2 2 3
s = 5 1 1
s = 9 1 2 1
1 3 3 1
1 4 6 4 1
四、程序填空题
1．（1）ByeVal （2）k Mod i （3）k = k \ i （4）Call pp(i)
2．（1）a() Aa Double （2）n-1 （3）a(j) < a(k)
3．（1）a() As Double, n As Integer （2）t = t * x （3）f = s
五、程序设计题
程序1．界面设计略，过程设计如下：
Private Function fsum(x() As Double, n As Integer) As Double
Dim i As Integer
For i = 1 To n
fsum = fsum + x(i)
Next i
fsum = fsum / n
End Function
程序2．界面设计略，过程设计如下：
Private Sub ff(a() As Single, n As Integer)
Dim i As Integer, x As Single
For i = 1 To n \ 2
x = a(n - i + 1): a(n - i + 1) = a(i): a(i) = x
Next i
End Sub
程序3．界面设计略，过程设计如下：
Private Sub find(x() As Single, m As byte, n As Byte, _
xmax As Single,ki As Byte,kj As Byte）
xmax = x(1,1): ki = 1: kj = 1
For i = 1 To m
For j = 1 To n
If Abs(x(i, j)) > Abs(xmax) Then xmax = x(i, j): ki = i: kj = j
Next j, i
End Sub
第5章 常用控件
一、判断题
1．× 2．× 3．× 4．√ 5．× 6．√ 7．× 8．√ 9．√
10．√ 11．× 12．× 13．√ 14．√ 15．× 16．× 17．× 18．√
19．√ 20．× 21．√ 22．× 23．√ 24．× 25．√
二、选择题
1．C 2．D 3．B 4．B 5．B 6．C 7．B 8．B 9．B 10．A
11．D 12．C 13．B 14．B 15．A 16．D 17．B 18．B 19．B 20．A
三、填空题
1．上、下、左、左 2．缇、无关 3．&、<Alt>+<Y> 4．Enabled 5．MaxLength
6．Text1.SetFocus 7．MultiLine 8．Visible 9．Alignment 10．AutoSize
11．ForeColor 12．0或1 13．True 14．1 15．AddItem
16．1 17．List1.Clear 18．文本框、列表框
19．下拉式组合框、简单组合框、下拉式列表框 20．Scroll 21．Value
22．Change 23．定时器不起作用 24．Timer 25．65535
四、程序阅读题
程序1. 116 程序2. 8
程序3. 23451 程序4. 小，你好！ 程序5. 您好
34512 小李，你好！ 欢迎使用Visual Basic!

程序6. 李子 程序7. y = 6 程序8. n = 1
苹果 y = 14 n = 3
橘子 n = 5
葡萄
柚子
香蕉
五、程序填空题
1．（1）a(i) = Mid(str1, i, 1) 或 a(i) = Mid(Text1.Text, i, 1)
（2）p = j （3）a(i) = a(p) （4）Command2.Enabled = True
2．（1）1 To 2*i–1 （2）Command2.Enabled = True （3）Command2.Enabled = False
3．（1）Text2.Enabled = False （2）p = 2 （3）Print i
（4）Val(Text1.Text) < 2 或 Val(Text1.Text) <= 1 （5）KeyAscii = 13
4．（1）List1.ListCount （2）List1.RemoveItem I （3）i = i + 1
5．（1）Timer1.Enabled = True （2）x \ 3600
（3）(x Mod 3600) \ 60 或 (x - 3600 * h) \ 60 （4）x = x + 1
6．（1）Label1.Left （2）Label1.Left = -Label1.Width
六、程序设计题
程序1. 界面设计略，过程设计如下：
Private Sub Command1_Click()
If Command1.Caption = "显示" Then
Print "欢迎使用Visual Basic！": Command1.Caption = "清除"
Else
Form1.Cls: Command1.Caption = "显示"
End If
End Sub
Private Sub Command2_Click()
End
End Sub
Private Sub Form_Load()
Form1.Cls: Command1.Caption = "显示": Command2.Caption = "退出"
End Sub
程序2．界面设计略，过程设计如下：
Private Sub Form_Load()
Text1.MaxLength = 1: Text1.Text = ""
End Sub
Private Sub Text1_KeyPress(KeyAscii As Integer)
Label1.Caption = CStr(KeyAscii)
End Sub
程序3．界面设计略，过程设计如下：
Const pwd As String = "123456" '预设密码为123456
Private Sub Command1_Click()
Cls: Print "欢迎进入！"
End Sub
Private Sub Form_Load()
Command1.Caption = "进入": Command1.Enabled = Falsew
Text1.Text = "": Text1.PasswordChar = "*"
End Sub
Private Sub Text1_KeyPress(KeyAscii As Integer)
If KeyAscii = 13 Then
If Text1.Text = pwd Then
m = MsgBox("口令正确，欢迎进入！"): Command1.Enabled = True
Else
m = MsgBox("口令错误,请重新输入！"): Text1.Text = ""
End If
End If
End Sub
程序4．界面设计略，过程设计如下：
Dim num As Integer, m As Integer, rec As Integer
Private Sub Form_Load()
Command1.Caption = "出题": Command1.Enabled = True
Text1.Text = "": Text1.Enabled = False: rec = 0
End Sub
Private Sub Command1_Click()
Randomize: num = Int(Rnd * 100) + 1: Text1.Enabled = True
Label1.Caption = "": Command1.Enabled = False
End Sub
Private Sub Command2_Click()
End
End Sub
Private Sub Text1_KeyPress(KeyAscii As Integer)
If KeyAscii = 13 Then
m = Val(Text1.Text): rec = rec + 1: Text1.SelStart = 0
Text1.SelLength = Len(Text1.Text): Text1.SetFocus
If rec > 10 Then
Label1.Caption = "差！重新开始": Call Form_Load
Else
If m > num Then
Label1.Caption = Str(m) & "大了！"
ElseIf m < num Then
Label1.Caption = Str(m) & "小了！"
Else
If rec < 5 Then
Label1.Caption = "好！猜对了。"
Else
Label1.Caption = "还行！猜对了。"
End If
Call Form_Load
End If
End If
End If
End Sub
程序5．界面设计如图10-3所示，过程设计如下：
Private Sub Form_Load()
Command1(0).Enabled = False: Command1(1).Enabled = False
Command1(2).Enabled = False: Label1.Caption = ""
End Sub
Private Sub Command1_Click(Index As Integer)
Select Case Index
Case 0
Clipboard.Clear: Clipboard.SetText Text1.SelText
Text1.SelText = "": Label1.Caption = "请选择要粘贴的位置！"
Command1(0).Enabled = False: Command1(1).Enabled = False
Command1(2).Enabled = True
Case 1
Clipboard.Clear: Clipboard.SetText Text1.SelText
Label1.Caption = "请选择要粘贴的位置！": Command1(0).Enabled = False
Command1(1).Enabled = False: Command1(2).Enabled = True
Case Else
Text1.SelText = Clipboard.GetText(): Form_Load
Label1.Caption = "粘贴完成！"
End Select
End Sub
Private Sub Text1_MouseUp(Button As Integer, Shift As Integer, _
X As Single, Y As Single)
Dim n As Integer
n = Text1.SelLength
If n > 0 Then
Label1.Caption = "选择了" & n & "个字,请选择下一步操作！"
Command1(0).Enabled = True: Command1(1).Enabled = True
Else
Label1.Caption = ""
End If
End Sub
程序6．界面设计如图10-4所示，过程设计如下：
Private Sub Form_Load()
Label1.Caption = " 当前日期：": Text1.Text = Date
Option1(0).Caption = "显示日期": Option1(1).Caption = "显示时间"
Option1(0).Value = True: Command1.Caption = "退出"
End Sub
Private Sub Option1_Click(Index As Integer)
Select Case Index
Case 0
Label1.Caption = "当前日期：": Text1.Text = Date
Case 1
Label1.Caption = "当前时间：": Text1.Text = Time
End Select
End Sub
Private Sub Command1_Click()
End
End Sub
程序7．过程设计如下：
Private Sub Form_Load()
Label1.Caption = " 当前日期：": Text1.Text = Date
Option1(0).Caption = "显示日期": Option1(1).Caption = "显示时间"
Option1(0).Value = True: Command1.Caption = "退出"
Combo1.AddItem "年-月-日": Combo1.AddItem "月-日-年"
Combo1.AddItem "日-月-年": Combo1.Text = "年-月-日"
End Sub
Private Sub Combo1_Click()
Dim n As String
Select Case Combo1.ListIndex
Case 0: n = "yyyy-mm-dd"
Case 1: n = "mm-dd-yyyy"
Case 2: n = "dd-mm-yyyy"
End Select
Text1.Text = Format(Date, n)
End Sub
Private Sub Option1_Click(Index As Integer)
Select Case Index
Case 0: Label1.Caption = "当前日期：": Text1.Text = Date
Case 1: Label1.Caption = "当前时间：": Text1.Text = Time
End Select
End Sub
Private Sub Command1_Click()
End
End Sub
程序8. 界面设计如图10-5所示，过程设计如下：
Private Sub Form_Load()
List1.AddItem "happy": List1.AddItem "apple"
List1.AddItem "student": List1.AddItem "computer"
End Sub
Private Sub Command1_Click()
List1.AddItem Text1.Text: Text1.SetFocus
Text1.SelStart = 0: Text1.SelLength = Len(Text1.Text)
End Sub
Private Sub Command3_Click()
List1.Clear
End Sub
Private Sub Command4_Click()
End
End Sub
Private Sub Command2_Click()
If List1.ListIndex <> -1 Then List1.RemoveItem List1.ListIndex
End Sub
9．界面设计如图10-6所示，过程设计如下：
Private Sub Form_Load()
Option1(0).Caption = "八进制": Option1(1).Caption = "十六进制"
Option1(2).Caption = "二进制"
End Sub
Private Function tran(k As Long, n As Integer) As String
Dim x As Integer, y As String * 1, k1 As Long
tran = "": k1 = Abs(k)
Do While k1 > 0
x = k1 Mod n
If x >= 10 Then y = Chr(Asc("A") + x - 10) Else y = CStr(x)
tran = y + tran
k1 = k1 \ n
Loop
If k < 0 Then tran = "-" + tran
End Function
Private Sub Option1_Click(Index As Integer)
Dim k As Long, n As Integer
k = Val(Text1.Text)
Select Case Index
Case 0
Label2.Caption = "八进制": n = 8
Case 1
Label2.Caption = "十六进制": n = 16
Case 2
Label2.Caption = "二进制": n = 2
End Select
Text2.Text = tran(k, n)
End Sub
10．界面设计如图10-7所示，过程设计如下：
Private Sub Form_Load()
Label1.Left = Width / 2 - Label1.Width / 2
Label1.AutoSize = True
HScroll1.Min = 1: HScroll1.Max = 1000
HScroll1.SmallChange = 10: HScroll1.LargeChange = 100
HScroll1.Value = 500: Timer1.Interval = 500
End Sub
Private Sub HScroll1_Change()
Timer1.Interval = HScroll1.Value
End Sub
Private Sub HScroll1_Scroll()
Call HScroll1_Change
End Sub
Private Sub Timer1_Timer()
Label1.FontSize = Label1.FontSize + 2
Label1.Left = Width / 2 - Label1.Width / 2
If Label1.FontSize >= 72 Then Timer1.Enabled = False
End Sub
第6章 图形控件和图形方法
一、判断题
1．√ 2．× 3．√ 4．× 5．√ 6．× 7．× 8．× 9．√ 10．√
二、选择题
1．C 2．B 3．C 4．A 5．A 6．C 7．A 8．C 9．C 10．B
11．A 12．B 13．B 14．C 15．C
三、填空题
1． Circle (ScaleLe