freebsd man page for modf

MODF(3) 						   BSD Library Functions Manual 						   MODF(3)

NAME
     modf, modff, modfl -- extract signed integral and fractional values from floating-point number

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     modf(double value, double *iptr);

     float
     modff(float value, float *iptr);

     long double
     modfl(long double value, long double *iptr);

DESCRIPTION
     The modf(), modff(), and modfl() functions break the argument value into integral and fractional parts, each of which has the same sign as
     the argument.  It stores the integral part as a floating point number in the object pointed to by iptr.

RETURN VALUES
     These functions return the signed fractional part of value.

SEE ALSO
     frexp(3), ldexp(3), math(3)

STANDARDS
     The modf(), modff(), and modfl() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

BSD
								  March 29, 2008							       BSD