files directory not found?

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ludvikjahn
ludvikjahn 2015-3-11
编辑： Stephen23 2015-3-11
GoodMorning, I ust want torun a script where it could give a value of zero if the selected directory doesn't exist.
It could be:
if dir C:\a == 'not found'
B=0
else
B=1
end
Actually i wanted an errormessage tho show up in gui, but that I can do by myself. Thanks

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采纳的回答

Guillaume
Guillaume 2015-3-11
Use exist:
if exist('C:\a', 'dir')

更多回答（1 个）

Stephen23
Stephen23 2015-3-11
Use exist and also check for the correct output value:
if exist('C:\a', 'dir')==7
See the documentation for the list of output values.
  2 个评论
Guillaume
Guillaume 2015-3-11
Well, if you specify the 'kind' (as 'dir'), then the output is either 7 or 0. Hence you don't actually need the comparison.
it does not hurt to be explicit though.
Stephen23
Stephen23 2015-3-11
编辑：Stephen23 2015-3-11
@Guillaume: agreed that it is not strictly required, but it might make the code a bit more robust to future code changes (poorly managed find-and-replace, for example).

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