Home/ Questions/Q 8011841
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-04T19:08:07+00:00

sscanf(line, %d %64[^\n, &seconds, message); does %64[^ mean – up to 64 characters? Should

  • 0
sscanf(line, "%d %64[^\n", &seconds, message);

does %64[^ mean – up to 64 characters?
Should it work with GNU C Compiler?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    It means “read at most 64 characters or stop when reaching a newline, whichever comes first”. It’s specified by the standard so all standard libraries have to support it.

    C11 7.21.6.2

    [ Matches a nonempty sequence of characters from a set of expected
    characters (the scanset).
    […]
    The conversion specifier includes all subsequent characters in the
    format string, up to and including the matching right bracket (]).

    The characters between the brackets (the scanlist) compose the
    scanset, unless the character after the left bracket is a circumflex
    (^), in which case the scanset contains all characters that do not
    appear in the scanlist     between the circumflex and the right bracket.

    As noted in the comments, a matching ] is probably required to delimit the scanlist. An s specifier is not required.

    • 0