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Full Discussion: how to use hex escape char with string in C?
Top Forums Programming how to use hex escape char with string in C? Post 302475180 by vistastar on Saturday 27th of November 2010 12:22:08 AM
Old 11-27-2010
how to use hex escape char with string in C?
I want it to ouput "abcd", but it dosen't.

Code:
  1 #include<stdio.h>
  2 int main()
  3 {
  4         printf("a\x62cd");
  5 }
  6

gcc alarm.c -o alarm
alarm.c: In function 'main':
alarm.c:4:9: warning: hex escape sequence out of range

It seems that the complier joint "cd" as part of \x62.
Maybe I can write it like this:
Code:
printf("a\x62""cd");

but it is a bit urgly...
Last edited by vistastar; 11-27-2010 at 01:28 AM..
 

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LEARN ABOUT LINUX

alarm

ALARM(2)						     Linux Programmer's Manual							  ALARM(2)

NAME

       alarm - set an alarm clock for delivery of a signal

SYNOPSIS

       #include <unistd.h>

       unsigned int alarm(unsigned int seconds);

DESCRIPTION

       alarm() arranges for a SIGALRM signal to be delivered to the calling process in seconds seconds.

       If seconds is zero, no new alarm() is scheduled.

       In any event any previously set alarm() is canceled.

RETURN VALUE

       alarm()	returns the number of seconds remaining until any previously scheduled alarm was due to be delivered, or zero if there was no pre-
       viously scheduled alarm.

CONFORMING TO

       SVr4, POSIX.1-2001, 4.3BSD.

NOTES

       alarm() and setitimer(2) share the same timer; calls to one will interfere with use of the other.

       sleep(3) may be implemented using SIGALRM; mixing calls to alarm() and sleep(3) is a bad idea.

       Scheduling delays can, as ever, cause the execution of the process to be delayed by an arbitrary amount of time.

SEE ALSO

       gettimeofday(2), pause(2), select(2), setitimer(2), sigaction(2), signal(2), sleep(3), time(7)

COLOPHON

       This page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2008-06-12								  ALARM(2)
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