Originální popis anglicky:
copysign, copysignf, copysignl - number manipulation function
Návod, kniha: POSIX Programmer's Manual
#include <math.h>
double copysign(double
x, double
y );
float copysignf(float
x, float
y );
long double copysignl(long double
x, long double
y);
These functions shall produce a value with the magnitude of
x and the
sign of
y. On implementations that represent a signed zero but do not
treat negative zero consistently in arithmetic operations, these functions
regard the sign of zero as positive.
Upon successful completion, these functions shall return a value with the
magnitude of
x and the sign of
y.
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
signbit() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<math.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- 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
.
