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  1. /*
  2.  * Copyright (c) 2008, Manuel Mausz <manuel at mausz.at>
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions are met:
  7.  *     * Redistributions of source code must retain the above copyright
  8.  *       notice, this list of conditions and the following disclaimer.
  9.  *     * Redistributions in binary form must reproduce the above copyright
  10.  *       notice, this list of conditions and the following disclaimer in the
  11.  *       documentation and/or other materials provided with the distribution.
  12.  *     * Neither the name of the copyright holders nor the
  13.  *       names of its contributors may be used to endorse or promote products
  14.  *       derived from this software without specific prior written permission.
  15.  *
  16.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17.  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18.  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19.  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20.  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  22.  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  23.  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24.  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  25.  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  26.  * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  27.  * DAMAGE.
  28.  */
  29.  
  30. import java.util.Scanner;
  31.  
  32. /**
  33.  * Implements a RPN Calculator
  34.  * - Fills calculator with operations
  35.  * - Parses the given input syntax
  36.  * - passes them to the RPN Calculator
  37.  * - and prints the specified (tho completely non-informative) error messages
  38.  *
  39.  * @version 1.0
  40.  * @author  Manuel Mausz (manuel at mausz.at)
  41.  * @author  http://manuel.mausz.at/
  42.  */
  43. class Main
  44. {
  45.   public static void main(String args[])
  46.   {
  47.     Rechner calc = new Rechner();
  48.     calc.addOperation(new AddOperation());
  49.     calc.addOperation(new SubOperation());
  50.     calc.addOperation(new MulOperation());
  51.     calc.addOperation(new DivOperation());
  52.     calc.addOperation(new PowOperation());
  53.     calc.addOperation(new InvOperation());
  54.     calc.addOperation(new SinOperation());
  55.     calc.addOperation(new CosOperation());
  56.     // missing in spec?
  57.     //calc.addOperation(new FacOperation());
  58.  
  59.     /* read syntax */
  60.     Scanner scan = new Scanner(System.in);
  61.     try
  62.     {
  63.       while(scan.hasNext())
  64.       {
  65.         /* pass operand or operator to RPNCalculator */
  66.         if (scan.hasNextDouble())
  67.           calc.enterNumber(scan.nextDouble());
  68.         else if (scan.hasNext())
  69.           calc.enterOperation(scan.next());
  70.       }
  71.  
  72.       /* dump RPN stack */
  73.       System.out.println(calc);
  74.     }
  75.     catch(InvalidParameterException e)
  76.     {
  77.       System.out.println("?");
  78.     }
  79.     catch(InvalidOperationException e)
  80.     {
  81.       System.out.println("FALSCHE EINGABE");
  82.     }
  83.     scan.close();
  84.   }
  85. }
  86.