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  1. #1
    Join Date
    Mar 2004
    Posts
    41

    converting strings to integers

    Hi I am programing in C I was hoping that someone could give me some code to convert a string an integer thanks

  2. #2
    Join Date
    Feb 2004
    Location
    Canada
    Posts
    277

    Re: converting strings to integers

    man atoi

    Code:
    ATOI(3)                    Linux Programmer's Manual                   ATOI(3)
    
    NAME
           atoi, atol, atoll, atoq - convert a string to an integer.
    
    SYNOPSIS
           #include <stdlib.h>
    
           int atoi(const char *nptr);
           long atol(const char *nptr);
           long long atoll(const char *nptr);
           long long atoq(const char *nptr);
    
    DESCRIPTION
           The  atoi() function converts the initial portion of the string pointed
           to by nptr to int.  The behaviour is the same as
    
                  strtol(nptr, (char **)NULL, 10);
    
           except that atoi() does not detect errors.
    
    	   The atol() and atoll() functions behave the same as atoi(), except that
           they  convert the initial portion of the string to their return type of
           long or long long.  atoq() is an obsolete name for atoll().
    
    RETURN VALUE
           The converted value.
    
    CONFORMING TO
           SVID 3, POSIX.1, BSD 4.3, ISO/IEC 9899.  ISO/IEC  9899:1990  (C89)  and
           POSIX.1  (1996  edition)  include the functions atoi() and atol() only;
           C99 adds the function atoll().
    
    NOTES
           The non-standard atoq() function is not present in libc 4.6.27 or glibc
           2, but is present in libc5 and libc 4.7 (though only as an inline func-
           tion in <stdlib.h> until libc 5.4.44).  The atoll() function is present
           in glibc 2 since version 2.0.2, but not in libc4 or libc5.
    
    SEE ALSO
           atof(3), strtod(3), strtol(3), strtoul(3)
    
    GNU                               2000-12-17                           ATOI(3)
    Being a pessimist is wonderful; you are either proven right, or pleasantly surprised.

  3. #3
    Join Date
    May 2000
    Location
    KY, USA
    Posts
    18,652

    Re: converting strings to integers

    Take a look at the following FAQ...

  4. #4
    Ejaz's Avatar
    Ejaz is offline Elite Member Power Poster
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