SDSU CS 635 Advanced Object-Oriented Design & Programming
Spring Semester, 2001
Assignment 3
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San Diego State University -- This page last updated 25-Feb-01

Assignment 3
Spreadsheet and Patterns
Due April 12

This assignment can be implemented in C++, Java or Smalltalk. The goal of this assignment is to help you understand patterns by implementing them. Some languages and class libraries contain features that implement all or part of this assignment. An example is JTable in Swing. Do not use features in this assignment that implement patterns for you or allow you to avoid implementing a pattern. If you have any doubt if using a feature of a class library in this assignment ask me.

1. Implement a spreadsheet with 6 cells. Label the cells A, B, C, D, E, F. The contents of the cells is to be displayed in a GUI. Each cell can contain either a float or an equation. Equations can be limited to using +, -, / and * for operators. You can, but are not required to, limit yourself to equations with one operator. Equations can contain references to other cells. So cell C could contain the equation A + B and cell E could contain the equation C - D. When the user changes the value of a cell, other cells that refer to the changed cell need to be updated. The spreadsheet needs an undo operation. The undo should unlimited.

2. Identify patterns that could be used in part 1. If you did not use a pattern justify that decision.

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2001 SDSU & Roger Whitney, 5500 Campanile Drive, San Diego, CA 92182-7700 USA.
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