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1 | .\" Copyright 1995 Jim Van Zandt <jrv@vanzandt.mv.com> |
2 | .\" | |
93015253 | 3 | .\" %%%LICENSE_START(VERBATIM) |
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4 | .\" Permission is granted to make and distribute verbatim copies of this |
5 | .\" manual provided the copyright notice and this permission notice are | |
6 | .\" preserved on all copies. | |
7 | .\" | |
8 | .\" Permission is granted to copy and distribute modified versions of this | |
9 | .\" manual under the conditions for verbatim copying, provided that the | |
10 | .\" entire resulting derived work is distributed under the terms of a | |
11 | .\" permission notice identical to this one. | |
c13182ef | 12 | .\" |
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13 | .\" Since the Linux kernel and libraries are constantly changing, this |
14 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
15 | .\" responsibility for errors or omissions, or for damages resulting from | |
16 | .\" the use of the information contained herein. The author(s) may not | |
17 | .\" have taken the same level of care in the production of this manual, | |
18 | .\" which is licensed free of charge, as they might when working | |
19 | .\" professionally. | |
c13182ef | 20 | .\" |
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21 | .\" Formatted or processed versions of this manual, if unaccompanied by |
22 | .\" the source, must acknowledge the copyright and authors of this work. | |
4b72fb64 | 23 | .\" %%%LICENSE_END |
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24 | .\" |
25 | .\" changed `square root' into `cube root' - aeb, 950919 | |
26 | .\" | |
27 | .\" Modified 2002-07-27 Walter Harms | |
28 | .\" (walter.harms@informatik.uni-oldenburg.de) | |
29 | .\" | |
4b8c67d9 | 30 | .TH CBRT 3 2017-09-15 "GNU" "Linux Programmer's Manual" |
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31 | .SH NAME |
32 | cbrt, cbrtf, cbrtl \- cube root function | |
33 | .SH SYNOPSIS | |
34 | .nf | |
35 | .B #include <math.h> | |
68e4db0a | 36 | .PP |
fea681da | 37 | .BI "double cbrt(double " x ); |
fea681da | 38 | .BI "float cbrtf(float " x ); |
fea681da MK |
39 | .BI "long double cbrtl(long double " x ); |
40 | .fi | |
68e4db0a | 41 | .PP |
20c58d70 | 42 | Link with \fI\-lm\fP. |
68e4db0a | 43 | .PP |
cc4615cc MK |
44 | .in -4n |
45 | Feature Test Macro Requirements for glibc (see | |
46 | .BR feature_test_macros (7)): | |
47 | .in | |
68e4db0a | 48 | .PP |
cc4615cc | 49 | .ad l |
54b0fbfb | 50 | .BR cbrt (): |
54b0fbfb | 51 | .br |
6360784c | 52 | .RS 4 |
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53 | _ISOC99_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L |
54 | || _XOPEN_SOURCE\ >=\ 500 | |
cf7fa0a1 | 55 | .\" || _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED |
636ed4d5 MK |
56 | || /* Since glibc 2.19: */ _DEFAULT_SOURCE |
57 | || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE | |
6360784c | 58 | .RE |
cc4615cc MK |
59 | .BR cbrtf (), |
60 | .BR cbrtl (): | |
6360784c | 61 | .RS 4 |
636ed4d5 MK |
62 | _ISOC99_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L |
63 | || /* Since glibc 2.19: */ _DEFAULT_SOURCE | |
64 | || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE | |
c9f2ff9d | 65 | .RE |
cc4615cc | 66 | .ad b |
fea681da | 67 | .SH DESCRIPTION |
5600f73a | 68 | These functions return the (real) cube root of |
022671eb | 69 | .IR x . |
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70 | This function cannot fail; every representable real value has a |
71 | representable real cube root. | |
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72 | .SH RETURN VALUE |
73 | These functions return the cube root of | |
74 | .IR x . | |
847e0d88 | 75 | .PP |
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76 | If |
77 | .I x | |
c3074d70 | 78 | is +0, \-0, positive infinity, negative infinity, or NaN, |
54b0fbfb MK |
79 | .I x |
80 | is returned. | |
81 | .SH ERRORS | |
82 | No errors occur. | |
680c76f1 | 83 | .SH ATTRIBUTES |
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84 | For an explanation of the terms used in this section, see |
85 | .BR attributes (7). | |
86 | .TS | |
87 | allbox; | |
88 | lbw24 lb lb | |
89 | l l l. | |
90 | Interface Attribute Value | |
91 | T{ | |
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92 | .BR cbrt (), |
93 | .BR cbrtf (), | |
680c76f1 | 94 | .BR cbrtl () |
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95 | T} Thread safety MT-Safe |
96 | .TE | |
47297adb | 97 | .SH CONFORMING TO |
9a74e018 | 98 | C99, POSIX.1-2001, POSIX.1-2008. |
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99 | .\" .BR cbrt () |
100 | .\" was a GNU extension. It is now a C99 requirement. | |
47297adb | 101 | .SH SEE ALSO |
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102 | .BR pow (3), |
103 | .BR sqrt (3) |