Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

modff(3p) [centos man page]

MODF(3P)						     POSIX Programmer's Manual							  MODF(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
modf, modff, modfl - decompose a floating-point number SYNOPSIS
#include <math.h> double modf(double x, double *iptr); float modff(float value, float *iptr); long double modfl(long double value, long double *iptr); DESCRIPTION
These functions shall 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 the modfl() function), in the object pointed to by iptr. RETURN VALUE
Upon successful completion, these functions shall return the signed fractional part of x. If x is NaN, a NaN shall be returned, and *iptr shall be set to a NaN. If x is +-Inf, +-0 shall be returned, and *iptr shall be set to +-Inf. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
The modf() function computes the function result and *iptr such that: a = modf(x, iptr) ; x == a+*iptr ; allowing for the usual floating-point inaccuracies. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
frexp(), isnan(), ldexp(), the Base Definitions volume of IEEE Std 1003.1-2001, <math.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 MODF(3P)

Check Out this Related Man Page

FREXP(3P)						     POSIX Programmer's Manual							 FREXP(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
frexp, frexpf, frexpl - extract mantissa and exponent from a double precision number SYNOPSIS
#include <math.h> double frexp(double num, int *exp); float frexpf(float num, int *exp); long double frexpl(long double num, int *exp); DESCRIPTION
These functions shall break a floating-point number num into a normalized fraction and an integral power of 2. The integer exponent shall be stored in the int object pointed to by exp. RETURN VALUE
For finite arguments, these functions shall return the value x, such that x has a magnitude in the interval [0.5,1) or 0, and num equals x times 2 raised to the power *exp. If num is NaN, a NaN shall be returned, and the value of *exp is unspecified. If num is +-0, +-0 shall be returned, and the value of *exp shall be 0. If num is +-Inf, num shall be returned, and the value of *exp is unspecified. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
isnan(), ldexp(), modf(), the Base Definitions volume of IEEE Std 1003.1-2001, <math.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 FREXP(3P)
Man Page

Featured Tech Videos