| .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) |
| .\" |
| .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE) |
| .\" Distributed under GPL |
| .\" %%%LICENSE_END |
| .\" |
| .TH CLOG10 3 2017-09-15 "" "Linux Programmer's Manual" |
| .SH NAME |
| clog10, clog10f, clog10l \- base-10 logarithm of a complex number |
| .SH SYNOPSIS |
| .BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */" |
| .br |
| .B #include <complex.h> |
| .PP |
| .BI "double complex clog10(double complex " z ); |
| .br |
| .BI "float complex clog10f(float complex " z ); |
| .br |
| .BI "long double complex clog10l(long double complex " z ); |
| .PP |
| Link with \fI\-lm\fP. |
| .SH DESCRIPTION |
| The call |
| .I clog10(z) |
| is equivalent to: |
| .PP |
| clog(z)/log(10) |
| .PP |
| or equally: |
| .PP |
| log10(cabs(c)) + I * carg(c) / log(10) |
| .PP |
| The other functions perform the same task for |
| .I float |
| and |
| .IR "long double" . |
| .PP |
| Note that |
| .I z |
| close to zero will cause an overflow. |
| .SH VERSIONS |
| These functions first appeared in glibc in version 2.1. |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .TS |
| allbox; |
| lbw30 lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR clog10 (), |
| .BR clog10f (), |
| .BR clog10l () |
| T} Thread safety MT-Safe |
| .TE |
| .SH CONFORMING TO |
| These functions are GNU extensions. |
| The identifiers are reserved for future use in C99 and C11. |
| .SH SEE ALSO |
| .BR cabs (3), |
| .BR cexp (3), |
| .BR clog (3), |
| .BR clog2 (3), |
| .BR complex (7) |
