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Asked: 2026-05-12T14:20:13+00:00

I read that atoi() is deprecated and that it is equivalent to: (int)strtol(token_start, (char

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I read that atoi() is deprecated and that it is equivalent to:

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

Does that mean I should use the above instead of atoi(chr) or is it just saying they are equivalent?

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1 Answer

  1. Editorial Team

    It does say on Apple’s Mac OS X Manual Page for atoi(3) (and in the BSD man pages too) that atoi has been deprecated.

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

    I would use the strtol() equivalent just for that reason, but i doubt you have to worry about atoi() being removed.


    from http://www.codecogs.com/library/computing/c/stdlib.h/atoi.php
    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.

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