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.
COMPLIANCE
modf
is ANSI C. modff
is an extension.