MODF(3)

NAME
1.41 `modf', `modff'--split fractional and integer parts

SYNOPSIS
     #include <math.h>
     double modf(double VAL, double *IPART);
     float modff(float VAL, float *IPART);

DESCRIPTION
`modf' splits the double VAL apart into an integer part and a fractional part, returning the fractional part and storing the integer part in `*IPART'. No rounding whatsoever is done; the sum of the integer and fractional parts is guaranteed to be exactly equal to VAL.
 That is, if REALPART = modf(VAL, &INTPART); then ``REALPART+INTPART'' is the same as VAL. `modff' is identical, save that it takes and returns `float' rather than `double' values.

RETURNS
The fractional part is returned. Each result has the same sign as the supplied argument VAL.

PORTABILITY
`modf' is ANSI C. `modff' is an extension.

SEE ALSO
modf is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.