Hallo, dies ist ein Test.

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'\" te .\" Copyright (c) 2001, the Institute of Electrical and Electronics Engineers, Inc. and The Open Group. All Rights Reserved. .\" Copyright (c) 1992, X/Open Company Limited. All Rights Reserved. .\" Portions Copyright (c) 2006, 2016, Oracle and/or its affiliates. All rights reserved. .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html. This notice shall appear on any product containing this material. .TH ilogb 3M "27 Sept 2016" "Solaris 11.4" "Mathematical Library Functions" .SH NAME ilogb, ilogbf, ilogbl \- return an unbiased exponent .SH SYNOPSIS .LP .nf c99 [ \fIflag\fR... ] \fIfile\fR... \fB-lm\fR [ \fIlibrary\fR... ] #include <math.h> \fBint\fR \fBilogb\fR(\fBdouble\fR \fIx\fR); .fi .LP .nf \fBint\fR \fBilogbf\fR(\fBfloat\fR \fIx\fR); .fi .LP .nf \fBint\fR \fBilogbl\fR(\fBlong double\fR \fIx\fR); .fi .LP .nf cc [ \fIflag\fR... ] \fIfile\fR... \fB-lm\fR [ \fIlibrary\fR... ] #include <math.h> \fBint\fR \fBilogb\fR(\fBdouble\fR \fIx\fR); .fi .LP .nf \fBint\fR \fBilogbf\fR(\fBfloat\fR \fIx\fR); .fi .LP .nf \fBint\fR \fBilogbl\fR(\fBlong double\fR \fIx\fR); .fi .SH DESCRIPTION .sp .LP These functions return the exponent part of their argument \fIx\fR. Formally, the return value is the integral part of \fBlog\fR(r)| \fIx\fR | as a signed integral value, for non-zero \fIx\fR, where \fIr\fR is the radix of the machine's floating point arithmetic, which is the value of \fBFLT_RADIX\fR defined in <\fBfloat.h\fR>. .SH RETURN VALUES .sp .LP Upon successful completion, these functions return the exponent part of \fIx\fR as a signed integer value. They are equivalent to calling the corresponding \fBlogb\fR(3M) function and casting the returned value to type \fBint\fR. .sp .LP If \fIx\fR is 0, the value \fBFP_ILOGB0\fR is returned. For SUSv3-conforming applications compiled with the \fBc99\fR compiler driver (see \fBstandards\fR(7)), a domain error occurs. .sp .LP If \fIx\fR is \(+-Inf, the value \fBINT_MAX\fR is returned. For SUSv3-conforming applications compiled with the \fBc99\fR compiler driver, a domain error occurs. .sp .LP If \fIx\fR is NaN, the value \fBFP_ILOGBNAN\fR is returned. For SUSv3-conforming applications compiled with the \fBc99\fR compiler driver, a domain error occurs. .SH ERRORS .sp .LP These functions will fail if: .sp .ne 2 .mk .na \fBDomain Error\fR .ad .RS 16n .rt The \fIx\fR argument is zero, NaN, or \(+-Inf. .sp If the integer expression (\fBmath_errhandling\fR & \fBMATH_ERREXCEPT\fR) is non-zero, then the invalid floating-point exception is raised. .RE .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .TS tab( ) box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPE ATTRIBUTE VALUE _ Interface Stability Committed _ Availability system/library/math _ MT-Level MT-Safe _ Standard See \fBstandards\fR(7). .TE .sp .SH SEE ALSO .sp .LP \fBlimits.h\fR(3HEAD), \fBmath.h\fR(3HEAD), \fBfeclearexcept\fR(3M), \fBfetestexcept\fR(3M), \fBlogb\fR(3M), \fBscalb\fR(3M), \fBattributes\fR(7), \fBstandards\fR(7)