ATOF(S)                  XENIX System V                   ATOF(S)



     Name
          atof, atoi, atol - Converts ASCII to numbers.

     Syntax
          double atof (nptr)
          char *nptr;

          int atoi (nptr)
          char *nptr;

          long atol (nptr)
          char *nptr;

     Description
          These functions convert a string pointed to by nptr to
          floating, integer, and long integer numbers respectively.
          The first unrecognized character ends the string.

          atof recognizes a string of the form:

               [ +| - ] digits[. digits ][ e| E [ +| - ] digits ]

          where the digits are continguous decimal digits.  Any number
          of tabs and spaces may precede the string.  The + and -
          signs are optional.  Either e or E may be used to mark the
          beginning of the exponent.

          atoi and atol recognize strings of the form:

               [ +| - ] digits

          where the digits are contiguous decimal digits.  Any number
          of tabs and spaces may precede the string.   The + and -
          signs are optional.

     See Also
          scanf(S)

     Notes
          There are no provisions for overflow.

          These routines must be linked by using the -lm linker
          option.












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