mirror of https://github.com/mkerrisk/man-pages
54 lines
1.1 KiB
Groff
54 lines
1.1 KiB
Groff
.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
|
|
.\"
|
|
.\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
|
|
.\" Distributed under GPL
|
|
.\" %%%LICENSE_END
|
|
.\"
|
|
.TH CIMAG 3 2015-04-19 "" "Linux Programmer's Manual"
|
|
.SH NAME
|
|
cimag, cimagf, cimagl \- get imaginary part of a complex number
|
|
.SH SYNOPSIS
|
|
.B #include <complex.h>
|
|
.PP
|
|
.BI "double cimag(double complex " z ");"
|
|
.br
|
|
.BI "float cimagf(float complex " z ");"
|
|
.br
|
|
.BI "long double cimagl(long double complex " z ");"
|
|
.PP
|
|
Link with \fI\-lm\fP.
|
|
.SH DESCRIPTION
|
|
These functions return the imaginary part of the complex number
|
|
.IR z .
|
|
.PP
|
|
One has:
|
|
.PP
|
|
.nf
|
|
z = creal(z) + I * cimag(z)
|
|
.fi
|
|
.SH VERSIONS
|
|
These functions first appeared in glibc in version 2.1.
|
|
.SH ATTRIBUTES
|
|
For an explanation of the terms used in this section, see
|
|
.BR attributes (7).
|
|
.TS
|
|
allbox;
|
|
lbw27 lb lb
|
|
l l l.
|
|
Interface Attribute Value
|
|
T{
|
|
.BR cimag (),
|
|
.BR cimagf (),
|
|
.BR cimagl ()
|
|
T} Thread safety MT-Safe
|
|
.TE
|
|
.SH CONFORMING TO
|
|
C99, POSIX.1-2001, POSIX.1-2008.
|
|
.SH NOTES
|
|
gcc also supports __imag__.
|
|
That is a GNU extension.
|
|
.SH SEE ALSO
|
|
.BR cabs (3),
|
|
.BR creal (3),
|
|
.BR complex (7)
|