题目

有如下 VB 程序段： Dim s As String, t As String, res As String Dim i As Integer, k As Integer s = "jpqzaabdcfb" i = 1: k = 1: res = "" t = Mid(s, 1, 1) Do While i < Len(s)     If Mid(s, i + 1, 1) >= Mid(s, i, 1) Then         k = k + 1     Else         res = res + CStr(k) + t         k = 1         t = Mid(s, i + 1, 1)     End If     i = i + 1 Loop Label1.Caption = res 执行该段程序段后，Label1中输出的值为 （    ） A . 4j1a3a2c1b B . 4j4a2c1b C . 4j4a2c D . 4j1a3a2c 答案：C

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