vb程序设计教程(第3版)课后实验答案

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1、A．1PrivateSubCommand1_Click()Label3=Text1EndSubA．2PrivateSubForm_Load()Timer1.Interval=0EndSubPrivateSubCommand1_Click()'自动Timer1.Interval=200EndSubPrivateSubCommand2_Click()'手动Timer1.Interval=0CallMyMoveEndSubPrivateSubTimer1_Timer()CallMyMoveEndSubSubMyMove()Label1.

2、MoveLabel1.Left-50IfLabel1.Left<0ThenLabel1.Left=Form1.WidthEndSubA．3PrivateSubForm_Click()Text1=Val(Text1)+1EndSubPrivateSubForm_Load()Text1=0EndSubA．4PrivateSubForm_Click()Caption="单击窗体，改变图片"Picture=LoadPicture(App.Path+"_015.bmp")Print"欢迎使用VB"EndSubPrivateSubForm

3、_DblClick()ClsCaption="双击窗体，卸去图片"Picture=LoadPicture("")'EndSubPrivateSubForm_Load()Caption="装入窗体"Picture=LoadPicture(App.Path+"_016.bmp")Print"装入图"EndSubPrivateSubForm_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.Heig

4、ht=260*16+200'260是图的高度，象素单位，200是窗体的标题栏高度EndSubA．5SubCommand1_Click()Text1.FontName="隶书"Text1.FontSize=25EndSubSubCommand2_Click()Text2.Text=Text1.SelTextText2.FontName=Text1.FontNameText2.FontSize=Text1.FontSizeEndSubB．1PrivateSubCommand1_Click()Text2=Format(5/9*(Val(

5、Text1)-32),"0.00")EndSubPrivateSubCommand2_Click()Text1=Format(9/5*Val(Text2)+32,"0.00")EndSub或PrivateSubCommand1_Click()Dimf!,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EndSubPrivateSubCommand2_Click()Dimff!,cc!'声明两个变量cc=Val(Text2)ff=9/5*cc+32Text1

6、=Format(ff,"0.00")'保留两位小数EndSubB．2PrivateSubCommand1_Click()Label2=Format(Val(Text1)*Val(Text1)*3.14,"0.00")EndSubPrivateSubCommand2_Click()Label3=Format(Val(Text1)*3.14*2,"0.00")EndSubPrivateSubText1_LostFocus()IfNotIsNumeric(Text1.Text)ThenMsgBox"输入有非数字字符，请重新输入",,"警

7、告"Text1.Text=""Text1.SetFocusEndIfEndSub或PrivateSubCommand1_Click()Label2=Format(Val(Text1)*Val(Text1)*3.14,"0.00")EndSubPrivateSubCommand2_Click()Label3=Format(Val(Text1)*3.14*2,"0.00")EndSubPrivateSubText1_KeyPress(KeyAsciiAsInteger)IfKeyAscii=13ThenIfNotIsNumeric(T

8、ext1.Text)ThenText1.Text=""EndIfEndIfEndSubB．3PrivateSubCommand1_Click()n=Int(Log(2)/Log(1.008)+1)Label1=n&"年后人数超过26亿"EndSub