《第4章 VB控制结构》习题(2)

For i = 1 To 3 For j = 0 To i-1 s = s + s * j Next j ? s;

11、

Next i

阅读下列程序段： m = 0

For i = 1 To 3 For j = 1 To i

m = m + j Next j, i

执行以上的循环后，i和m的值分别为 。

运行下列程序段，其中“n=n+1”语句被执行的次数是。 Dim m%, n% For m = 1 To 3 For n = 1 To 6 Step 2 n = n + 1 Print n Next n

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Next m

窗体上有一个命令按钮Command1，编写如下事件过程： Private Sub Command1_Click() Sum = 0

For m = 1 To 3 Select Case m Case 1 a = 1 Case 2 a = 2 Case 3 a = 3 End Select Print a, Sum = Sum + a Next m Print Sum

End Sub

运行时，单击按钮，输出结果是 。

14、

窗体上有一个命令按钮Command1，编写如下事件过程： Private Sub Command1_Click() a = 80: b = 50: c = 30

If a < b Or b > c Then b = c

If b = c And a < c Then a = a - 30

12、