下列有关VB属性说法正确的是( )
A.计时器每隔3秒Timer事件发生一次,则Interval属性应设置为3 |
B.设置标签框字体的颜色应在Font属性中设置 |
C.图像框(imagel)中图片的加载可以通过Picture属性设置 |
D.确定一个控件在窗体上位置的属性是Width和Height |
更新时间:2020-08-30 10:35:04
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【知识点】 VB程序的调试
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【推荐1】有如下VB程序段:
Key = Val (Text1. Text)
i = 1:j = 10
flag = False
s = " "
Do While i <= j And Not flag
Text2. Text = s
已知数组a(1 To 10)中的数据分别是12、21、34、45、59、63、72、86、94、100,在文本框Text1中输入34,程序运行后文本框Text2中显示的内容是( )
Key = Val (Text1. Text)
i = 1:j = 10
flag = False
s = " "
Do While i <= j And Not flag
mid1 = Int(i+(j-i)/3)
mid2 = Int(j-(j-i)/3)
If Key = a(mid1) Then
flag = True
ElseIf Key < a(mid1) Then
j = midl-1
ElseIf Key = a(mid2)Then
flag = True
ElseIf Key > a(mid2) Then
i = mid2+1
Else
i = midl+1
j = mid2-1
End If
s = s & " " & mid1 & ":" & mid 2
LoopText2. Text = s
已知数组a(1 To 10)中的数据分别是12、21、34、45、59、63、72、86、94、100,在文本框Text1中输入34,程序运行后文本框Text2中显示的内容是( )
A.4:7 1:2 | B.4:7 1:2 3:3 | C.4:7 1:3 3:3 | D.4:7 3:3 |
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【推荐2】在Vb语言中,下列变量名命名合法的是( )
A.Int | B.myif | C.a_3! | D.3xy |
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适中
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【推荐3】有如下VB程序段:
Dim a(1 To 6) As Integer
Dim i As Integer, j As Integer, n As Integer
Randomize
For i = 1 To 6
a(i) = Int(Rnd * 50)
If a(i) < 25 And i Mod 2 = 0 Then
a(i) = 50 - a(i)
Else
a(i) = Int(Rnd * 10) * 2
End If
Next i
For i = 1 To 6 - 1
For j = 1 To 6 - i - 1
If a(j) > a(j + 2) Then
temp = a(j): a(j) = a(j + 2): a(j + 2) = temp
End If
Next j
Next i
执行上述程序段后,a数组的各元素可能是( )
Dim a(1 To 6) As Integer
Dim i As Integer, j As Integer, n As Integer
Randomize
For i = 1 To 6
a(i) = Int(Rnd * 50)
If a(i) < 25 And i Mod 2 = 0 Then
a(i) = 50 - a(i)
Else
a(i) = Int(Rnd * 10) * 2
End If
Next i
For i = 1 To 6 - 1
For j = 1 To 6 - i - 1
If a(j) > a(j + 2) Then
temp = a(j): a(j) = a(j + 2): a(j + 2) = temp
End If
Next j
Next i
执行上述程序段后,a数组的各元素可能是( )
A.4,2,8,27,16,35 | B.2,4,8,16,27,35 |
C.2,4,8,16,25,35 | D.4,2,8,25,16,35 |
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