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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" Distributed under GPL
.\"
.\" Japanese Version Copyright (c) 2003 Akihiro MOTOKI
.\" all rights reserved.
.\" Translated 2003-07-24, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2005-10-02, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.\"WORD: argument (˺ɸ)г
.\"WORD: coordinates ɸ
.\"WORD: rectangular coordinates ľɸ
.\"WORD: polar coordinates ˺ɸ
.\"
.TH CARG 3 2008-08-06 "" "Linux Programmer's Manual"
.SH ̾
carg, cargf, cargl \- ʣǿгѤ
.SH
.B #include <complex.h>
.sp
.BI "double carg(double complex " z ");"
.br
.BI "float cargf(float complex " z ");"
.br
.BI "long double cargl(long double complex " z ");"
.sp
\fI\-lm\fP ǥ롣
.SH
ʣǿ 2Ĥμ¿ͤʤɸɽȤǤ롣
ľɸȤȡʲΤ褦˽ȤǤ롣
.nf
z = x + I * y
.fi
ǡ\fIx\ =\ creal(z)\fP, \fIy\ =\ cimag(z)\fP Ǥ롣
.LP
ޤ˺ɸȤȡʲΤ褦˽ȤǤ롣
.nf
z = r * cexp(I * a)
.fi
ǡ
\fIr\ =\ cabs(z)\fP ϡȾ¡סַפǤꡢ
\fIz\fP ͤǤ롣
\fIa\ =\ carg(z)\fP ϡְѡפǤꡢ
\fIz\fP гѤǤ롣
.LP
δط:
.nf
tan(carg(z)) = cimag(z) / creal(z)
.fi
.SH ֤
֤ͤ [\-pi,pi] ϰϤǤ롣
.SH С
δؿ glibc С 2.1 ǽо줷
.SH
C99.
.SH Ϣ
.BR cabs (3),
.BR complex (7)
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