Project: P2 - Spreadsheets (Janak)
Parent: Build the Program: Cell classes and spreadsheet classes
Create the classes Spreadsheet, SpreadsheetSumSheet, CellAverageSheet, and SpreadSheetViewContainer
Strategy:
Create the spreadsheet class (which is the main interface to the system of classes) and the two classes which handle the operations (Sum and Average)
Generic form of this step: How to build a GUI using the C+N library