4.3BSD - /usr/man/cat3/atoi.0

ATOF(3)                                                                ATOF(3)


NAME
       atof, atoi, atol - convert ASCII to numbers

SYNOPSIS
       double atof(nptr)
       char *nptr;

       atoi(nptr)
       char *nptr;

       long atol(nptr)
       char *nptr;

DESCRIPTION
       These  functions convert a string pointed to by nptr to floating, inte‐
       ger, and long integer representation respectively.  The first  unrecog‐
       nized character ends the string.

       Atof  recognizes  an  optional string of spaces, then an optional sign,
       then a string of digits optionally containing a decimal point, then  an
       optional ‘e’ or ‘E’ followed by an optionally signed integer.

       Atoi  and atol recognize an optional string of spaces, then an optional
       sign, then a string of digits.

SEE ALSO
       scanf(3S)

BUGS
       There are no provisions for overflow.


7th Edition                      May 15, 1985                          ATOF(3)