1.\" Copyright (c) 2004 Stefan Farfeleder 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd August 7, 2004 28.Dt CIMAG 3 29.Os 30.Sh NAME 31.Nm cimag , cimagf , cimagl , 32.Nm conj , conjf , conjl , 33.Nm creal , crealf , creall 34.Nd "functions to manipulate complex numbers" 35.Sh LIBRARY 36.Lb libm 37.Sh SYNOPSIS 38.In complex.h 39.Ft double 40.Fn cimag "double complex z" 41.Ft float 42.Fn cimagf "float complex z" 43.Ft "long double" 44.Fn cimagl "long double complex z" 45.Ft "double complex" 46.Fn conj "double complex z" 47.Ft "float complex" 48.Fn conjf "float complex z" 49.Ft "long double complex" 50.Fn conjl "long double complex z" 51.Ft double 52.Fn creal "double complex z" 53.Ft float 54.Fn crealf "float complex z" 55.Ft "long double" 56.Fn creall "long double complex z" 57.Sh DESCRIPTION 58Let 59.Sm off 60.Fa a + b * Em i 61.Sm on 62denote the complex number 63.Fa z . 64.Pp 65The 66.Fn cimag 67functions return the imaginary part 68.Fa b . 69.Pp 70The 71.Fn conj 72functions return the complex conjugate 73.Sm off 74.Fa a - b * Em i . 75.Sm on 76.Pp 77The 78.Fn creal 79functions return the real part 80.Fa a . 81.Sh STANDARDS 82The 83.Fn cimag , 84.Fn conj 85and 86.Fn creal 87functions conform to 88.St -isoC-99 . 89.Sh HISTORY 90The 91.Fn cimag , 92.Fn conj 93and 94.Fn creal 95functions first appeared in 96.Fx 5.3 . 97