square.calc

来自「Calc Software Package for Number Calc」· CALC 代码 · 共 69 行

#!/usr/local/src/cmd/calc/calc -q -f
/*
 * sqaure - print the squares of input values
 *
 * Copyright (C) 2000-2007  Ernest Bowen
 *
 * 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: 29.4 $
 * @(#) $Id: square.calc,v 29.4 2007/02/07 00:34:04 chongo Exp $
 * @(#) $Source: /usr/local/src/cmd/calc/cscript/RCS/square.calc,v $
 *
 * Under source code control:	2000/12/15 06:52:01
 * File existed as early as:	2000
 *
 * Share and enjoy!  :-) http://www.isthe.com/chongo/tech/comp/calc/
 */

/*
 * Usage:
 *
 *       From the shell:
 *
 *               ./square
 *               cat file | ./square
 *               echo "123" | ./square
 *
 *       Within calc:
 *
 *               > read square
 *
 *  With input from a terminal, there is no prompt but each non-empty
 *  line of input is evaluated as a calc expression and if it can be
 *  calculated, the square of the value of that expression is displayed.
 *  Execution stops when an empty line is input.
 *
 *  From the shell:
 *
 *       ./square
 *
 *  The following shows lines of input followed by output:
 *
 *       1234
 *               1522756
 *       ln(2)
 *               ~.48045301391820142467
 *       config("mode","frac"), bernoulli(10)
 *               25/4356
 *       config("mode", "hex"), 0xff
 *               0xfe01
 */


global s;
while ((s = prompt("")))
	print "\t":eval(s)^2;