1. (2021·丽水、湖州、衢州模拟) 有如下VB程序段：

s = "PYTHON"

t = "8421"

result = ""

For i = 1 To Len(t)

    x = Val(Mid(t, i, 1))

    y = (x - 1) Mod Len(s) + 1

    result = result + Mid(s, y, 1)

Next i

Text1.Text = result

执行上述程序段后，文本框Text1中显示的是