sum = 0
n = 0
For i = 1 To 5
x = n / i
n = n + 1
sum = sum + x
Next
End Sub
该程序通过For循环计算一个表达式的值,这个表达式是
(A)1+1/2+ 2/3+3/4+4/5 (B)1+1/2+2/3+3/4
(C)1/2+2/3+3/4+4/5 (D)1+1/2+1/3+1/4+1/5
8. 程序如下:
Private Sub Form_Click( )
Dim a As Integer , b As Integer
a = 5 : b = 8
Call Fun (a , b)
Print a , b
End Sub
Private Sub Fun ( x As Integer , y As Integer )
x = x * y
y = y * x
End Sub
程序运行时,单击窗体后,在窗体上输出的结果为( 【81】 )
(A)5 8 (B)40 40 (C)40 8 (D)40 320
9. 在窗体上画一个命令按钮,然后编写如下事件过程:
Private Sub Command1_Click( )
x=0
For i=1 to 3
x=1
For j=1 to 4
x=2
For k=1 to 5
x = x + 2
Next k
Next j
Next i
Print x
End Sub
程序运行后,单击命令按钮,输出结果为( 【82】 )
(A)12 (B)24 (C)36 (D)48
10. 在窗体上画一个命令按钮,然后编写如下代码:
Private Type Record
ID As Integer
Name As String * 20
End Type
Private Sub Command1_Click( )
Dim MaxSize , NextChar , MyChar
Open “D:\Vb2003Ks\Ks78.Dat ” For Binary As #1
MaxSize = LOF ( 1 )
For NextChar = MaxSize To 1 Step -1
Seek # 1 , NextChar
MyChar = Input ( 1 , # 1 )
Next NextChar
Print EOF ( 1 )
Close # 1
End Sub
程序运行后,单击命令按钮,其输出结果为( 【83】 )
(A)True (B)False (C)Null (D)0
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