[Scilab-users] Once and for all curing input() : a good target for Scilab 6.0.1 <== Re: Bug in input statement

[Samuel Gougeon]

Once more user report about input(): http://bugzilla.scilab.org/15069
SG

Le 03/03/2017 à 21:06, Samuel Gougeon a écrit :
> Hello Osvaldo,
>
> Yes, there are awful sticky bugs on input(). Despite it is a "basic" 
> function, it has never ever worked in a completely right way. It is a 
> quite nasty situation for a high level language to have such a pitfall 
> on basics.
> IMO, curing it once and for all should be in the top-10 priorities for 
> Scilab 6.0.1.
>
> Let's have a look to input() behavior versus Scilab's versions:
> *4.0 - 4.1.2:*
> -->mprintf("head of line"); mprintf(" without ending newline");
> head of line without ending newline
> -->mprintf("head of line"); s=input("Message: ","s")
> head of lineMessage: *-->*myAnswer // no way to forget that we are 
> prompted.. :/
>  s  =
>  myAnswer
>
> *5.1.0, 5.2.0, 5.3.0:*
> -->mprintf("head of line"); mprintf(" without ending newline");
> head of line without ending newline
> // this blank line is displayed only from Scilab 5.3.0 on
> -->mprintf("head of line"); s=input("Message: ","s")
> head of line // why this newline?
> Message:myAnswer // eaten space after ":" when prompting
>  s  =
>  myAnswer
>
> *5.4.0, 5.5.0 - 5.5.2:*
> -->mprintf("head of line"); mprintf(" without ending newline");
> head of line without ending newline
> -->mprintf("head of line"); s=input("Message: ","s")
> head of line         // but still: why this appended newline?
> Message: myAnswer// now the space is correctly displayed when prompting
>  s  =
>  myAnswer
>
> *6.0.0*:  the worst, as you described it and as it is already reported 
> in Bugzilla.
> http://bugzilla.scilab.org/14376
> http://bugzilla.scilab.org/14424
>
> I did not find any workaround.. Same issue with mscanf(): 
> http://bugzilla.scilab.org/14998
>
> Any idea for a workaround?
>
> Regards
> Samuel
>
> Le 03/03/2017 à 15:20, Osvaldo Sergio Farhat de Carvalho a écrit :
>> Hello,
>> I was trying some simple programs that use the input statement on 
>> Scilab 6.0.0, and I got unexpected behaviour. Here is a test:
>> n  =  input("n = ")
>> while  n  >  0
>>      n  =  input("n = ")
>> end
>> printf("\nThanks")
>>
>> Here is the result of this program on Scilab 6.0.0 console with input 
>> 1, 2, 3, 4 and 0:
>>
>> n =
>> 1
>>
>> n =
>> --> 2
>> n =
>> 3
>>
>> n =
>> 4
>>
>> n =
>> 0
>>
>>
>> Thanks
>> 2+2
>>  ans  =
>>
>>    4.
>>
>> Compare this with the output on Scilab 5.5.2 console for the same input:
>>
>> n = 1
>> n = 2
>> n = 3
>> n = 4
>> n = 0
>>
>> Thanks
>>
>> This is much more what one should expect from this litle program. 
>> Remark that on 6.0.0 console
>> 1) There is a disturbing new line after printing the input statement 
>> message
>> 2) There is a spurious apearance of the console prompt "-->" after 
>> the first execution of input statement
>> 3) The console prompt "-->" does not appear after the end of program 
>> execution.
>>
>> I am using Scilab on a Windows 10 system.
>>
>> Thanks for your attention.
>> Osvaldo
>>
>>
>>
>> _______________________________________________
>> users mailing list
>> users at lists.scilab.org
>> http://lists.scilab.org/mailman/listinfo/users
>
>
>
>
> _______________________________________________
> users mailing list
> users at lists.scilab.org
> http://lists.scilab.org/mailman/listinfo/users


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.scilab.org/pipermail/users/attachments/20170315/cc0efb73/attachment.htm>