MirBSD manpage: atoi(3)

ATOI(3)                    BSD Programmer's Manual                     ATOI(3)


     atoi - convert ASCII string to integer


     #include <stdlib.h>

     atoi(const char *nptr);


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

     It is equivalent to:

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


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


     The atoi() function conforms to ANSI X3.159-1989 ("ANSI C89").


     atoi does no overflow checking, handles unsigned numbers poorly, and han-
     dles strings containing trailing extra characters (like "123abc") poorly.
     Careful use of strtol(3) and strtoul(3) can alleviate these problems, but
     strtonum(3) can be used to convert numbers from strings much more safely
     and easily.

MirBSD #10-current               June 4, 1993                                1

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