Lab 3  Money In and Money Out:


Note: Viewing current or past student solutions to this problem would constitute a violation of Southwestern
University's Honor Code.

Written Design Document and Printouts of the two prelabs:   Feb. 8, 2007
Printouts and Diskette Due and Printed Grading Sheet:       Feb. 15, 2007
 

PreLab

  1. You are to complete the Pairclass that I  have begun. I will supply the UsePair class.
      2. A run will  look like:
      UsePair
      Please enter a number: 6
      Please enter another number: 7
      The sum is 13.0
      The difference is -1.0
      The product is 42.0
      The average is 6.5
      The distance is 1.0
      The maximum is 7.0
      The minimum is 6.0
  2. You are to complete the PlayWords class that I have begun.  -- it would  print out like below

    3. Please enter a word:  : antidisestablishmentarianism
    The word you entered was :antidisestablishmentarianism
    shmentarianismantidisestabli
           
    Please enter a word:  giraffe
    The word you entered was : giraffe
    affegir
     

  1. Save them to you flash Drive and print out the source and execution of each
Lab  Giving Change (P4.11 page 146 --Horstmann, Big Java)
Implement a program that directs a cashier how to give change.  The program has two inputs:  the amount due and the amount received from the customer.  Copute the difference, and compute the dollars, quarters, dimes nickels an dpennies that the customer should receive in return.

First transform the difference into an integer balance, denominated in pennies.  Then compute the whole dollar amount.  Subtract it from the balance.  Compute the number of quarters needed.  Repeat for dimes and nickels.  Display the remaining pennies.

Define a class Cashier wth the methods

Design Document (Due September 22) Contains comments for all methods (constructors, accessors, and modifiers) which tell parameters, preconditions and postconditions if appropriate, and method prototype (signature) line. Also include a list of all the tests that will prove your program runs. I have made available the source code from the book example of a Cash Register: CashRegister.java , CashRegisterTester.java and InputTester.java

/**
   Sets the amount due
   @param double dueAmount  the amount owed
   @post condition the private instance variable owed has been changed
*/
   public setAmountDue (double dueAmount)    <--this line is the method prototype
   {
   }

For example a TestCashier program might have:

Cashier harry = new Cashier();
harry.setAmountDue(9.37);
harry.receive(10);
int quarters = harry.returnQuarters(); //returns 2
int dimes = harry.returnDimers(); // returns 1
int nickels = hayy.returnNickels(); // returns 0
int pennies = harry.returnPennies(); // returns 3
Then you would print out values so that the output would look like:

TestCashier
Amount due: 9.37   Amount given: 10.00

Give the customer
0.0 dollars,
2.0 quarters,
1.0 dimes,
0.0 nickels,
3.0 pennies

{ Be sure to include several other test cases to that you have made sure that you can return all denominations)

*Note -- to account for innacurate conversions of decimals to int --  (int)(Math.round(change*100))

You must:hand in: