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modf (3)
  • modf (3) ( Solaris man: Библиотечные вызовы )
  • modf (3) ( FreeBSD man: Библиотечные вызовы )
  • modf (3) ( Русские man: Библиотечные вызовы )
  • >> modf (3) ( Linux man: Библиотечные вызовы )
  • modf (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

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

    SYNOPSIS

    #include <math.h>
    
    double modf(double x, double *iptr);
    
    float modff(float x, float *iptr);
    long double modfl(long double x, long double *iptr);

    Link with -lm.

    Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

    modf(), modl(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99  

    DESCRIPTION

    The modf() function breaks the argument x into an integral part and a fractional part, each of which has the same sign as x. The integral part is stored in the location pointed to by iptr.  

    RETURN VALUE

    The modf() function returns the fractional part of x.

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

    If x is positive infinity (negative infinity), +0 (-0) is returned, and *iptr is set to positive infinity (negative infinity).  

    ERRORS

    No errors occur.  

    CONFORMING TO

    C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD, C89.  

    SEE ALSO

    frexp(3), ldexp(3)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    CONFORMING TO
    SEE ALSO
    COLOPHON


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