有下面程序代码： Private Sub Command1_Click() Dim sign As Integer sign = 1 a = 1 b = 2 For k = 1 To 5 c = a

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问题有下面程序代码：
Private Sub Command1_Click()
Dim sign As Integer
sign = 1
a = 1
b = 2
For k = 1 To 5
      c = a + sign * b
      a = b
      b = c
      Print c;
      sign = -sign
Next k
End Sub
程序运行后，单击命令按钮Command1，输出结果是

选项 A、3  -1  2  -3  -1
B、3  5  8  13  21
C、-1  1  -2  -1  -1
D、3  4  5  6  7

答案A

解析 For循环执行5次，按公式计算可得，结果选A）。

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本试题收录于：二级VB题库NCRE全国计算机二级分类