在VB脚本中切换选择功能 [英] Switch Select function in VB Script

问题描述

大家好朋友我在vb脚本中执行如下简单代码：

Hi friends i am executing a simple code as follows in vb script :

dim a
a=inputbox("Enter the value of a")

select case a

  case (a<0)
     msgbox("a is less than zero")
  case (a<10)
     msgbox("a is less than 10")
  case (a>10 and a<20)
     msgbox("a is in between 10 and 20")
  case else
       msgbox("a is greater than 20")
end select

为a的每个值，我得到的输出为 a大于20

你能解释我做错了吗？

for every value of a ,i am getting output as a is greater than 20
can you explain where am i doing it wrong ?

推荐答案

你不能在案件中使用比较，它们必须是价值观。 />
它可以用于此：

You cannot use comparation in cases, they must be values.
It could work for this:

dim a

repeat:
a=inputbox("Enter the value of a between 0 and 5")
if a<0 or a>5 then
  msgbox("You entered an incorrect value")
  goto repeat
end if

select case a 
  case (0)
     msgbox("a is zero")
  case (1)
     msgbox("a is 1")
  case (2)
     msgbox("a is 2")
  case else
       msgbox("a is between 3 and 5")
end select

对于你想要做的事，你必须使用一串if if if。

For what you want to do you have to use a chain of if else if.

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