Step

Build the SpreadSheet classes. Those classes can not work by themselves without LinkedSpreadSheet classes.

Project: P2 - Spreadsheets (Derrick)

Parent: Build the Program: SpreadSheet classes and LinkedSpreadSheet classes, as well as the view-container class for them.

There are several SpreadSheet-related classes:

An abstract SpreadSheet, which is the superclass of all spreadsheet classes in this project, and which consists of SpreadsheetCells.
A SumSpreadsheet, which is used to calculate the sum, and a AverageSpreadsheet, which is for average value.