To solve this problem, I modified an implementation of an abstract data type from the book to add some of the functions that I needed. Winzip is one program that will uncompress zip files. Document all the code in the same style as the book's code. This means you must document my code and the code that you add to complete the solution to the problem. Typically each function will have at least one line about the purpose of the function.
More text is needed if the function is complicated.
Any Preconditions or Post Conditions should be noted as well. Provide the code for the functions in Itemtype.cpp. Develop a test plan and implement it. Hand in a description of the test plan and the results of applying it.