题目内容

设有一个命令按钮Command1的事件过程以及一个函数过程。程序如下： Private Sub Command1_Click() Static x As Integer x = f(x + 3) Cls Print x End Sub Private Function f(x%) As Integer f = x + x End Function 连续单击命令按钮3次，第3次单击命令按钮后，窗体上显示的计算结果是（）。

A. 6
B. 18
C. 42
D. 12

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运行程序，单击命令按钮Command1后窗体上输出结果是（）。 Private Function fun1(str$, ch$) As String Dim k As Integer Dim temp As String, s As String s = "" For k = 1 To Len(str) temp = Mid(str, k, 1) If temp = ch Then s = s & temp End If Next k fun1 = s End Function Private Sub Command1_Click() Dim str As String, ch As String str = "ABCABC" ch = "B" Print fun1(str, ch) End Sub

A. BB
B. ACAC
C. 程序出错
D. AA

运行程序，单击窗体后输出结果是（）。 Public Function fun(s As String) As String Dim tStr As String, n As Integer tStr = "" n = Len(s) i = 1 Do While i <= n / 2 tStr = tStr & Mid(s, i, 1) & Mid(s, n - i + 1, 1) i = i + 1 Loop fun = tStr End Function Private Sub Form_Click() Dim s1 As String s1 = "abcdef" Print UCase(fun(s1)) End Sub

AFBECD
B. abcdef
C. DEFABC
D. ABCDEF

阅读程序： Function fac(ByVal n As Integer) As Integer Dim temp As Integer temp = 1 For i = 1 To n temp = temp * i Next fac = temp End Function Private Sub Form_Click() Dim nsum As Integer, i As Integer nsum = 1 For i = 2 To 4 nsum = nsum + fac(i) Next Print nsum End Sub 程序运行后，单击窗体，输出结果是（）。

A. 33
B. 31
C. 35
D. 32

设有如下说明： Public Function F1(n%) …… n = 3 * n + 4 …… End Function Private Sub Command1_Click() Dim n%, m n = 3: m = 4 …… '调用F1语句 …… End Sub 则在Command1_Click事件中无效的调用语句是( )。

A. F1 (m)
B. F1 (5 )
C. F1 (5+m)
D. F1（n+m）