develop a simple calculator. The calculator has two sets of keys: ten numeric keys (0-9) and five operator keys ("+","-","*", "="). The keys are displayed on the calculator interface. Users can select the numbers and the operators with mouse. The selections as well as the results are displayed on a display area of the interface. In order to perform any calculation, the user has to make selections in the sequence: NUM1→operator→ NUM2→"=". For example, to add the numbers 2 and 32, the user has to select 2→+→32→=.

Answer the following.
a) Show any TWO use cases [answer with diagram, mainline sequence and alternate sequence (if any)]?
b) Identify the classes for object-oriented design of the calculator system (with ONLY one line description of each class).
c) Show the class diagram (ONLY the diagram, NO need to provide all the class definitions).

Answer rating: 100% (QA)

a Two use cases Use Case 1 Adding Numbers Mainline Sequence 1 User selects number 2 2 User selects o... View the full answer