atoi Post: 101567

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Top Forums Programming atoi Post 101567 by jim mcnamara on Thursday 9th of March 2006 05:28:18 PM

03-09-2006

Registered User

The standard for atoi is to read along a string from a given starting point until it encounters a space, a nul, or a non-numeric character. "name" starts with an "n" which is non-numeric. atoi is finsihed before it starts. By definition, atoi returns 0 in that case.

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atoi_l

ATOI(3) 						   BSD Library Functions Manual 						   ATOI(3)

NAME

     atoi, atoi_l -- convert ASCII string to integer

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <stdlib.h>

     int
     atoi(const char *str);

     #include <xlocale.h>

     int
     atoi_l(const char *str, locale_t loc);

DESCRIPTION

     The atoi() function converts the initial portion of the string pointed to by str to int representation.

     It is equivalent to:

	   (int)strtol(str, (char **)NULL, 10);

     While the atoi() function uses the current locale, the atoi_l() function may be passed a locale directly. See xlocale(3) for more informa-
     tion.

IMPLEMENTATION NOTES

     The atoi() function is not thread-safe and also not async-cancel safe.

     The atoi() function has been deprecated by strtol() and should not be used in new code.

ERRORS

     The function atoi() need not affect the value of errno on an error.

SEE ALSO

     atof(3), atol(3), strtod(3), strtol(3), strtoul(3), xlocale(3)

STANDARDS

     The atoi() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1''), ISO/IEC 9899:1990 (``ISO C90''), and ISO/IEC 9899:1999 (``ISO C99'').

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								   June 4, 1993 							       BSD