1、vb程序设计教材习题答案vb程序设计教材习题答案第1章 Visual Basic 6.0程序设计概述一、判断题1 23 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 1213 14 15 16 17 18 19 20二、选择题1. C 2. B 3D 4C 5B 6A 7D 8A 9B 10A 11C 12D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 5Left、Top 6属性、.=7网格 8F orm19Load或Initialize或Resize或Activate(自动执行的先后顺序也按此
2、排列)10Activate、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1Name(Label1)Caption(我的第一个VB程序)标签控件2Name(Label2)Caption(请输入你的姓名)FontUnderLine(True)FontItalic(True)命令按钮1Name(Command1)Caption(确定(&O)命令按钮2Name(Command2)Caption(结束(&X)过程设计如下:Private sub Form_Click()Command
3、2.Enabled = FalseEen SubPrivate Sub Command1_Click()Label2.Visible = FalseLabel1.Caption = Text1.Text + : 欢迎使用 + Label1.CaptionText1.Visible = FalseCommand1.Enabled = False: Command2.Enabled = TrueEnd SubPrivate Sub Command2_Click()EndEnd Sub程序2界面设计略,过程设计如下:Private Sub Command1_Click() 字体变大Form1.Fon
4、tSize = Form1.FontSize + 3Form1.Cls: Print 欢迎使用VBEnd SubPrivate Sub Command2_Click() 字体变小Form1.FontSize = Form1.FontSize - 3Form1.Cls: Print 欢迎使用VBEnd SubPrivate Sub Command3_Click() 字体加粗Form1.FontBold = TrueForm1.Cls: Print 欢迎使用VBEnd SubPrivate Sub Command4_Click() 字体不加粗Form1.FontBold = FalseForm1.
5、Cls: Print 欢迎使用VBEnd 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 SubPrivate Sub Form_Resize()Text1.Top = 0: Text1.Left = 0Text1.Width = Form1.ScaleWidth/2 用 Form1.ScaleWi
6、dth效果优于用Form1. WidthText1.Height = Form1.ScaleHeight/2 用 Form1.ScaleHeight优于用Form1. HeightCommand1.Top = Form1.ScaleHeight - Command1.HeightCommand1.Left = Form1.ScaleWidth - Command1.WidthEnd 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1B 2D 3A 4C 5C 6B 7A 8D 9. C 10A三、填空题1String 24 3aaa 4145 56 63
7、718 8False9(x Mod 10) * 10 + x 10 1010 + Int( Rnd * 90 ) 11a * b Mod c12Log(x)+Sin(3.141593/6) 13Const PI=3.1415926 14日期 15Int(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 Singlex = Text1.TextLabel1.Caption = x * x * 3.141593End Sub方法二、用InputBox函数输入圆的半径Private Sub
8、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 * 3.141593End 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1A 2D 3C 4C 5D 6B三、填空题1If xy Then t=y: y=x: x=t 2IS3For i = 0 to 9: B(i) = InputBox(B( & i & )=): Next i4Dim 5String 68四、程序阅读题(
9、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 i2(1)r = 0 (2)m Mod n3(1)i + j - 1 (2)7 - i (3)Print4(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
10、As Integer, z As IntegerDim max As Integer, midd As Integer, min As Integerx = 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 = yIf z max Then max = zIf x y Then min = x Else min = yIf z 3 Theny = x + 3ElseIf x = 1 Theny = x * xElseIf x 0 Theny = Sqr(x)Elsey
11、= 0End IfPrint yEnd 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 IntegerFor i = 1 To 9For j = 1 To 9Print Tab(j - 1) * 4); i * j;Next jPrintNext iEnd 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 SingleDim i As Integer, n As Integerx = InputBox(请输
12、入x的值:)n = InputBox(请输入n的值:)t = x / 2: s = tFor i = 3 To nt = t * x / is = s + tNext iPrint sEnd 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 Integere = 2: t = 1: i = 1While t = 0.0001i = i + 1: t = t / i: e = e + tWendPrint eEnd Sub程序6界面设计略,过程设计如下:Option Base 1Privat
13、e Sub Form_Click()Dim n As Integer, a(9, 9) As Integer, i As Integer, j As IntegerOn 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,0n10)For i = 1 To n: a(i, 1) = 1: a(i, i) = 1: Next iFor i = 3 To nFor j = 2 To i - 1a(i, j) = a(i - 1, j - 1) + a(i - 1, j)Next j, iFor i = 1 To nPrint Tab(30 -
14、 2 * i);For j = 1 To iPrint Space(4 - Len(Trim(Str(a(i, j); Trim(Str(a(i, j);Next jPrintNext iExit Subk: 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 2b() As Long 36 4按值传递 5按地址传递6Public x As Single 7Static x As Integer 8Form2.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.
15、1 1 2 1 1 2 1 2 2 2 2 3s = 5 1 1s = 9 1 2 11 3 3 11 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) Abs(xmax) Then xmax = x(i, j): ki = i: kj = jNext j, iEnd Sub第5章 常用控件一、判断题1 2 3 4 5 6 7 8 910 11 12 13 14 15 16 17 1819 20 21 22 23 24 25二、选择题1C 2D 3B 4B 5
16、B 6C 7B 8B 9B 10A11D 12C 13B 14B 15A 16D 17B 18B 19B 20A三、填空题1上、下、左、左 2缇、无关 3&、+ 4Enabled 5MaxLength6Text1.SetFocus 7MultiLine 8Visible 9Alignment 10AutoSize11ForeColor 120或1 13True 141 15AddItem161 17List1.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 20Scroll 21Value22Change 23定时器不起作用 24Timer 2565535四、程序阅读
17、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 = True2(1)1 To 2*i1 (2)Command2.Enabled = True (3)Command2.
18、Enabled = False3(1)Text2.Enabled = False (2)p = 2 (3)Print i(4)Val(Text1.Text) 2 或 Val(Text1.Text) 10 ThenLabel1.Caption = 差!重新开始: Call Form_LoadElseIf m num ThenLabel1.Caption = Str(m) & 大了!ElseIf m num ThenLabel1.Caption = Str(m) & 小了!ElseIf rec 0 ThenLabel1.Caption = 选择了 & n & 个字,请选择下一步操作!Command1(0).Enabled = True: Command1(1).Enabled = TrueElseLabel1.Caption = End IfEnd Sub程序
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