> On 14 Jun 2016, at 14:56, Bob Spelten <b...@upcmail.nl> wrote: > > Op Tue, 14 Jun 2016 15:43:00 +0200 schreef Marcel Kilgus > <ql-us...@mail.kilgus.net>: > >> Marcel Kilgus wrote: >>> François Van Emelen wrote: >>>> 10 f$="":REMark empty string >>>> 20 if FTEST(f$)=0 >>>> 30 DIR f$ >>>> 40 ELSE >>>> 50 PRINT f$," can't be a file name" >>>> 60 ENDIF >>>> >>>> Why is line 30 executed (displaying the directory of datad$) instead of >>>> line 50? >>> Because SMSQ/E defaults to dev1_ if you don't give a filename, I >>> presume. >> >> Strike that, it defaults to datad$ of course, which is set to "dev1_" >> in my case. I mean, that's what DATA_USE is for, providing a default >> directory for file operations. >> >> Marcel >> > I understand the datad$ but the problem is why FTEST returns a zero? > FTEST should return a -7, so DIR is should not be done. > >
The manual says that FTEST tests "a file or device”. Thus FTESTing win4_, say, returns “0” even if win4_ contains no files. George _______________________________________________ QL-Users Mailing List
