modf(3) [freebsd man page]

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

modf(3M)						  Mathematical Library Functions						  modf(3M)

NAME

       modf, modff, modfl - decompose floating-point number

SYNOPSIS

       cc [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double modf(double x, double *iptr);

       float modff(float x, float *iptr);

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

DESCRIPTION

       These  functions  break	the  argument x into integral and fractional parts, each of which has the same sign as the argument. It stores the
       integral part as a double for the modf() function, a float for the modff() function, or a long double for themodfl() function in the object
       pointed to by iptr.

RETURN VALUES

       Upon successful completion, these functions return the signed fractional part of x.

       If x is NaN, a NaN is returned and *iptr is set to NaN.

       If x is +-Inf, +-0 is returned and *iptr is set to +-Inf.

ERRORS

       No errors are defined.

USAGE

       These functions compute the function result and *iptr such that:

       a = modf(x, &iptr) ;
       x == a+*iptr ;

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       frexp(3M), isnan(3M), ldexp(3M), attributes(5), standards(5)

SunOS 5.10							    16 Aug 2004 							  modf(3M)