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Full Discussion: An error in my c++ program... please help urgent.
Top Forums Programming An error in my c++ program... please help urgent. Post 302505448 by Corona688 on Thursday 17th of March 2011 02:16:51 AM
Old 03-17-2011
Quote:
Originally Posted by poonam.gaigole
Why cannot I assume in my program the arrays ifx[] and pfx[] to end at '\0' ?
Because any contents you don't initialize yourself are undefined.
Quote:
Because since these are string arrays, I think we should assume it to end with a null character.
You have it exactly backwards. A string doesn't define a NULL -- a NULL defines a string. You've got chars arrays, which are just integers but smaller and have no mysterious auto-setting properties. Would you expect setting a[0] to also set a[1] for int? You were just lucky enough to be using global vars that "usually" default to 0. Try that with stack variables and you're in for a big surprise.
Quote:
Why we have to specify/initialize that the two arrays would end at null character?
If not you, then who?
Last edited by Corona688; 03-17-2011 at 03:23 AM..
 

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LEARN ABOUT DEBIAN

ausearch_add_regex

AUSEARCH_ADD_REGEX(3)						  Linux Audit API					     AUSEARCH_ADD_REGEX(3)

NAME

       ausearch_add_regex - use regular expression search rule

SYNOPSIS

       #include <auparse.h>

       int ausearch_add_regex(auparse_state_t *au, const char *expr);

DESCRIPTION

       ausearch_add_regex  adds  one search condition based on regular expressions to the audit search API. The search conditions can then be used
       to scan logs, files, or buffers for something of interest. You may not use this in combination with any other search expression. The  regu-
       lar expression follows the posix regular expression conventions. The search results are at the record level and not the field.

RETURN VALUE

       Returns -1 if an error occurs; otherwise, 0 for success.

SEE ALSO

       ausearch_add_expression(3), ausearch_add_item(3), ausearch_clear(3), ausearch_next_event(3), regcomp(3).

AUTHOR

       Steve Grubb

Red Hat 							     Sept 2007						     AUSEARCH_ADD_REGEX(3)
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