xref: /freebsd/lib/msun/man/cimag.3 (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1.\" Copyright (c) 2004 Stefan Farfeleder
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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