Hallo, dies ist ein Test.

PWD: /www/data-lst1/unixsoft/unixsoft/kaempfer/.public_html

Running in File Mode
Relative path: ././../../../../../../usr/man/man3m/hypot.3m
Real path: /usr/share/man/man3m/hypot.3m
Zurück

'\" 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 hypot 3M "12 Jul 2006" "Solaris 11.4" "Mathematical Library Functions" .SH NAME hypot, hypotf, hypotl \- Euclidean distance function .SH SYNOPSIS .LP .nf c99 [ \fIflag\fR... ] \fIfile\fR... \fB-lm\fR [ \fIlibrary\fR... ] #include <math.h> \fBdouble\fR \fBhypot\fR(\fBdouble\fR \fIx\fR, \fBdouble\fR \fIy\fR); .fi .LP .nf \fBfloat\fR \fBhypotf\fR(\fBfloat\fR \fIx\fR, \fBfloat\fR \fIy\fR); .fi .LP .nf \fBlong double\fR \fBhypotl\fR(\fBlong double\fR \fIx\fR, \fBlong double\fR \fIy\fR); .fi .SH DESCRIPTION .sp .LP These functions compute the length of the square root of \fIx\fR^2 + \fIy\fR^2 without undue overflow or underflow. .SH RETURN VALUES .sp .LP Upon successful completion, these functions return the length of the hypotenuse of a right angled triangle with sides of length \fIx\fR^2 and \fIy\fR^2. .sp .LP If the correct value would cause overflow, a range error occurs and \fBhypot()\fR, \fBhypotf()\fR, and \fBhypotl()\fR return the value of the macro \fBHUGE_VAL\fR, \fBHUGE_VALF\fR, and \fBHUGE_VALL\fR, respectively. .sp .LP If \fIx\fR or \fIy\fR is \(+-Inf, +Inf is returned even if one of \fIx\fR or \fIy\fR is NaN. .sp .LP If \fIx\fR or \fIy\fR is NaN and the other is not \(+-Inf, a NaN is returned. .SH ERRORS .sp .LP These functions will fail if: .sp .ne 2 .mk .na \fBRange Error\fR .ad .RS 15n .rt The result overflows. .sp If the integer expression (\fBmath_errhandling\fR & \fBMATH_ERREXCEPT\fR) is non-zero, the overflow floating-point exception is raised. .RE .SH USAGE .sp .LP \fBhypot\fR(\fIx\fR,\fIy\fR), \fBhypot\fR(\fIy\fR,\fIx\fR), and \fBhypot\fR(\fIx\fR, \(mi\fIy\fR) are equivalent. .sp .LP \fBhypot\fR(\fIx\fR, \(+-0) is equivalent to \fBfabs\fR(\fIx\fR). .sp .LP These functions takes precautions against underflow and overflow during intermediate steps of the computation. .sp .LP An application wanting to check for exceptions should call \fBfeclearexcept\fR(\fBFE_ALL_EXCEPT\fR) before calling these functions. On return, if \fBfetestexcept\fR(\fBFE_INVALID\fR | \fBFE_DIVBYZERO\fR | \fBFE_OVERFLOW\fR | \fBFE_UNDERFLOW\fR) is non-zero, an exception has been raised. An application should either examine the return value or check the floating point exception flags to detect exceptions. .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 \fBmath.h\fR(3HEAD), \fBfabs\fR(3M), \fBfeclearexcept\fR(3M), \fBfetestexcept\fR(3M), \fBisnan\fR(3M), \fBsqrt\fR(3M), \fBattributes\fR(7), \fBstandards\fR(7)