isqrt

来自「Calc Software Package for Number Calc」· 代码 · 共 53 行

NAME
    isqrt - integer part of square root

SYNOPSIS
    isqrt(x)

TYPES
    x		nonnegative real

    return	nonnegative real

DESCRIPTION
    Return the greatest integer n for which n^2 <= x.

EXAMPLE
    ; print isqrt(8.5), isqrt(200), isqrt(2e6), isqrt(2e56)
    2 14 1414 14142135623730950488016887242

LIMITS
    x > 0

LINK LIBRARY
    NUMBER *qisqrt(NUMBER *x)

SEE ALSO
    sqrt, iroot

## Copyright (C) 1999  Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
## or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL.  You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
##
## @(#) $Revision: 29.3 $
## @(#) $Id: isqrt,v 29.3 2006/05/07 07:25:46 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/isqrt,v $
##
## Under source code control:	1995/10/25 04:03:45
## File existed as early as:	1995
##
## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/