1 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
2 .\" and Copyright (C) 2011 Michael Kerrisk <mtk.manpages@gamil.com>
3 .\" Distributed under GPL
5 .\" Japanese Version Copyright (c) 2003 Akihiro MOTOKI
6 .\" all rights reserved.
7 .\" Translated Thu Jul 24 00:22:25 JST 2003
8 .\" by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
10 .\"WORD: arc sine µÕÀµ¸¹
11 .\"WORD: arc cosine µÕ;¸¹
12 .\"WORD: arc tangent µÕÀµÀÜ
13 .\"WORD: real part ¼ÂÉô
14 .\"WORD: imaginary part µõÉô
16 .TH CATAN 3 2011-09-15 "" "Linux Programmer's Manual"
18 catan, catanf, catanl \- Ê£ÁÇ¿ô¤ÎµÕÀµÀÜ (arc tangent)
20 .B #include <complex.h>
22 .BI "double complex catan(double complex " z );
24 .BI "float complex catanf(float complex " z );
26 .BI "long double complex catanl(long double complex " z );
28 \fI\-lm\fP ¤Ç¥ê¥ó¥¯¤¹¤ë¡£
33 ¤ÎµÕÀµÀÜ (arc tangent) ¤ò·×»»¤¹¤ë¡£
34 \fIy = catan(z)\fP ¤Ê¤é¤Ð¡¢ \fIz = ctan(y)\fP ¤¬À®Î©¤¹¤ë¡£
36 ¤Î¼ÂÉô¤ÎÃͤ϶è´Ö [\-pi/2,pi/2] ¤«¤éÁªÂò¤µ¤ì¤ë¡£
41 catan(z) = (clog(1 + i * z) \- clog(1 \- i * z)) / (2 * i)
44 ¤³¤ì¤é¤Î´Ø¿ô¤Ï glibc ¥Ð¡¼¥¸¥ç¥ó 2.1 ¤Ç½é¤á¤ÆÅо줷¤¿¡£
49 /* Link with "\-lm" */
57 main(int argc, char *argv[])
59 double complex z, c, f;
63 fprintf(stderr, "Usage: %s <real> <imag>\\n", argv[0]);
67 z = atof(argv[1]) + atof(argv[2]) * I;
70 printf("catan() = %6.3f %6.3f*i\\n", creal(c), cimag(c));
72 f = (clog(1 + i * z) \- clog(1 \- i * z)) / (2 * i);
73 printf("formula = %6.3f %6.3f*i\\n", creal(f2), cimag(f2));