modff---split fractional and integer parts
#include <math.h> double modf(double val, double *ipart); float modff(float val, float *ipart);
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
The fractional part is returned. Each result has the same sign as the supplied argument val.
modf is ANSI C.
modff is an extension.
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