判断X是否介于两个值之间的最佳方法是什么？ A97 [英] Best way to tell if X is between two values? A97

问题描述

225如果1< = MyCount< = 4那么GString =几天前。

230如果5< = MyCount< = 10那么GString =大约一周前。

235如果11< = MyCount< = 17那么GString ="大约2周前。

240如果18< = MyCount< = 24则GString ="约3周前。

245如果25< = MyCount< = 30那么GString =约一个月前。


以上几行不符合我的预期。什么是最好的方式

来做我想做的事情。如果你对上面的语法感到困惑，那么
那就不要打扰 - 它的旧东西。

解决方案

225如果1< = MyCount和MyCount< = 4那么GString =blan

230如果5< = MyCount和MyCount< = 10那么GString =" blah"

235如果11< = MyCount和MyCount< = 17那么GString =" blah"

240如果18< = MyCount和MyCount< = 24那么GString =" blah"


我知道上面的语法，好的。我只是想知道是否有另外一种类似于OP中旧式速记方式的方式？

可能有点长时间啰嗦输入所有案例但是 -


选择案例MyCount

案例

.....

结束选择


或者可能与之间的运营商


Select Case MyCount

Case MyCount介于1和之间4

GString =几天前 

Case MyCount介于5和10之间
GString =大约一周前"

.....

结束选择

-

Nick Coe（英国）
http://www.alphacos.co.uk/ AccHelp + pAnimal
http://www.pjandcoe.co.uk/ 在线商店
http://www.mrcomputersltd.com/ 代表airs upgrades


新闻：09 ******************************** @ 4ax.com，

MLH键入：

225如果1< = MyCount< = 4那么GString =几天之前。
230如果5< = MyCount< = 10那么GString =一周左右
之前。 " 235如果11< = MyCount< = 17那么GString =
约2周前。 " 240如果18< = MyCount< = 24则GString =
"约3周前。 " 245如果25< = MyCount< = 30那么
GString ="大约一个月前。

以上几行不符合我的预期。做我想做的事最好的方法是什么？如果您对上面的
语法感到困惑，那就不要打扰了 - 它的旧东西。

" Nick Coe（英国）" < CL ***************** @ MASPON.yahooDOTcom>在消息中写道

news：43 ********************** @ ptn-nntp-reader02.plus.net ... < blockquote class =post_quotes>可能有点长啰嗦要输入所有的情况但是 -

选择Case MyCount
案例
....
结束选择

或者可能与之间的运营商

选择案例MyCount
案例MyCount介于1和4之间
GString =几天前" <案例MyCount介于5和10之间
GString =大约一周前
....
结束选择

-
Nick Coe（英国）

Select Case是理想的解决方案，但使用To操作符。


选择Case MyCount

案例1至4：GS ....

案例5至10：GS ......

等

结束选择


选择Case优于原始发布代码的一个原因是效率。

它只会评估直到找到匹配项然后退出案例陈述。

使用之前发布的代码，IF ... Then语句系列，即使第一个命中，也会对其进行评估。


兰迪

225 If 1 <= MyCount <= 4 Then GString = "a few days ago. "
230 If 5 <= MyCount <= 10 Then GString = "a week or so ago. "
235 If 11 <= MyCount <= 17 Then GString = "about 2 weeks ago. "
240 If 18 <= MyCount <= 24 Then GString = "about 3 weeks ago. "
245 If 25 <= MyCount <= 30 Then GString = "about a month ago. "

The above lines do not do what I expected. What''s the best way
to do what I''m trying to do. If you''re confused by the above syntax,
then don''t bother - its old stuff.

解决方案

225 If 1 <= MyCount And MyCount <= 4 Then GString = "blan"
230 If 5 <= MyCount And MyCount <= 10 Then GString = "blah "
235 If 11 <= MyCount And MyCount <= 17 Then GString = "blah"
240 If 18 <= MyCount And MyCount <= 24 Then GString = "blah"

I know about the above syntax, OK. I just wondered if there was
another way similar to the old-style shorthand approach in the OP?

Might be a bit long winded to type in all the cases but -

Select Case MyCount
Case
.....
End Select

or perhaps with the between operator

Select Case MyCount
Case MyCount Between 1 and 4
GString = "a few days ago"
Case MyCount Between 5 And 10
GString = "a week or so ago"
.....
End Select
--
Nick Coe (UK)
http://www.alphacos.co.uk/ AccHelp + pAnimal
http://www.pjandcoe.co.uk/ Online Store
http://www.mrcomputersltd.com/ Repairs Upgrades

In news:09********************************@4ax.com,
MLH typed:

225 If 1 <= MyCount <= 4 Then GString = "a few days
ago. "
230 If 5 <= MyCount <= 10 Then GString = "a week or so
ago. " 235 If 11 <= MyCount <= 17 Then GString =
"about 2
weeks ago. " 240 If 18 <= MyCount <= 24 Then GString =
"about 3 weeks ago. " 245 If 25 <= MyCount <= 30 Then
GString = "about a month ago. "

The above lines do not do what I expected. What''s the best
way
to do what I''m trying to do. If you''re confused by the
above
syntax, then don''t bother - its old stuff.

"Nick Coe (UK)" <cl*****************@MASPON.yahooDOTcom> wrote in message
news:43**********************@ptn-nntp-reader02.plus.net...

Might be a bit long winded to type in all the cases but -

Select Case MyCount
Case
....
End Select

or perhaps with the between operator

Select Case MyCount
Case MyCount Between 1 and 4
GString = "a few days ago"
Case MyCount Between 5 And 10
GString = "a week or so ago"
....
End Select
--
Nick Coe (UK)

Select Case is the ideal solution for this, but use the To operator.

Select Case MyCount
Case 1 To 4 : GS....
Case 5 To 10: GS...
etc
End Select

One reason for choosing Case over the original posted code is efficiency.
It will only evaluate until a match is found then exit the Case statement.
With the earlier posted code, the series of IF...Then statements, all would
get evaluated, even if the first one hit.

Randy

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