mirror of https://github.com/mkerrisk/man-pages
37 lines
833 B
Groff
37 lines
833 B
Groff
.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
|
|
.\" Distributed under GPL
|
|
.\"
|
|
.TH CABS 3 2008-08-11 "" "Linux Programmer's Manual"
|
|
.SH NAME
|
|
cabs, cabsf, cabsl \- absolute value of a complex number
|
|
.SH SYNOPSIS
|
|
.B #include <complex.h>
|
|
.sp
|
|
.BI "double cabs(double complex " z );
|
|
.br
|
|
.BI "float cabsf(float complex " z );
|
|
.br
|
|
.BI "long double cabsl(long double complex " z );
|
|
.sp
|
|
Link with \fI\-lm\fP.
|
|
.SH DESCRIPTION
|
|
The
|
|
.BR cabs ()
|
|
function returns the absolute value of the complex number
|
|
.IR z .
|
|
The result is a real number.
|
|
.SH VERSIONS
|
|
These functions first appeared in glibc in version 2.1.
|
|
.SH "CONFORMING TO"
|
|
C99.
|
|
.SH NOTES
|
|
The function is actually an alias for
|
|
.I "hypot(a,\ b)"
|
|
(or, equivalently,
|
|
.IR "sqrt(a*a\ +\ b*b)" ).
|
|
.SH "SEE ALSO"
|
|
.BR abs (3),
|
|
.BR cimag (3),
|
|
.BR hypot (3),
|
|
.BR complex (7)
|