Question

Object oriented design: Write a program that implements the basic flow, the startup scenario (For a retail store) and the alternative flow: An item with the specified identifier has already been entered in the current sale. Program increases the sold quantity of the item, and presents item description, price, and running total. You do not have to program any other alternative flows or add any other functionality. You are also not required to code the view, you may replace the user interface with one single class, View, which contains hard-coded calls to the controller. Neither is there any requirement on databases or external systems. Instead of a database you can just store the data in the object in the integration layer, which should have been responsible for calling the database if there had been one. The external systems can simply be omitted, but there must be objects responsible for calling them. The solution must meet the following requirements. The code shall be compilable and executable. If the user interface is replaced with hard-coded method calls, there must be printouts in the class calling the controller, showing what the program does. . Try to follow the design from seminar two, but it is perfectly OK to change the design if you discover flaws. The solution must however have high cohesion, low coupling and good encapsulation with a well-defined public interface. . Your code shall follow all guidelines presented in chapter six in A First Course in Object Oriented Development. Regarding comments this means there must be one comment for each public declaration.

Answer 1

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