[Octave-bug-tracker] [bug #63383] Error in sscanf in special cases when '%f' conversion is used

[José Luis García Pallero]

URL:
  <https://savannah.gnu.org/bugs/?63383>

                 Summary: Error in sscanf in special cases when '%f'
conversion is used
                 Project: GNU Octave
               Submitter: jgpallero
               Submitted: vie 18 nov 2022 14:34:46
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: jgpallero
        Originator Email: 
             Open/Closed: Open
                 Release: other
         Discussion Lock: Any
        Operating System: Any


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Follow-up Comments:


-------------------------------------------------------
Date: vie 18 nov 2022 14:34:46       By: José Luis García Pallero
<jgpallero>
When I use the text string

>> a = '1 2 3 t';

in sscanf in order to extract the elements using '%f' I obtain obviously an
error message due to the last element:

>> [elements,n,msg]=sscanf(a,'%f')
elements =

   1
   2
   3

n = 3
msg = sscanf: format failed to match


But if the last element is the letter 'n':

>> a = '1 2 3 n';
>> [elements,n,msg]=sscanf(a,'%f')
elements =

   1
   2
   3

n = 3
msg =

Only three elements are extracted, as expected, but the error message is not
set, so this can not be used to check for errors (Matlab gets the error
message). The proplem is present, I think, only with letter 'n'.

If I use '%d' as conversion there is no problem:

>> a = '1 2 3 n';
>> a = '1 2 3 n';
>> [elements,n,msg]=sscanf(a,'%d')
elements =

   1
   2
   3

n = 3
msg = sscanf: format failed to match








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