09-12-2014
I am going back-forth with C and C++ these days, whenever I met some practical stuff I read(Too many to ask here!). I did not forget you helped me with the strtok() function in one of the posts, which is very profound and comprehensive to me, but performance is not too much of my concern at this moment.
Do you mean awk to do the job? Could you post it if you have the script handy? Thanks a lot!
Last edited by yifangt; 09-12-2014 at 01:16 PM..
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STRTOK(3) Library Functions Manual STRTOK(3)
NAME
strtok - string tokens
SYNOPSIS
#include <string.h>
char *
strtok(str, sep)
char *str;
char *sep;
DESCRIPTION
This interface is obsoleted by strsep(3).
The strtok() function is used to isolate sequential tokens in a null-terminated string, str . These tokens are separated in the string by
at least one of the characters in sep . The first time that strtok() is called, str should be specified; subsequent calls, wishing to
obtain further tokens from the same string, should pass a null pointer instead. The separator string, sep , must be supplied each time,
and may change between calls.
The strtok() function returns a pointer to the beginning of each subsequent token in the string, after replacing the token itself with a
NUL character. When no more tokens remain, a null pointer is returned.
SEE ALSO
index(3), memchr(3), rindex(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3
STANDARDS
The strtok() function conforms to ANSI C X3.159-1989 (``ANSI C'').
BUGS
There is no way to get tokens from multiple strings simultaneously.
The System V strtok(), if handed a string containing only delimiter characters, will not alter the next starting point, so that a call to
strtok() with a different (or empty) delimiter string may return a non-NULL value. Since this implementation always alters the next start-
ing point, such a sequence of calls would always return NULL.
4.4 Berkeley Distribution January 12, 1996 STRTOK(3)