This is a QT(C++) GUI application that implement addition and subtraction operations of different data types.
Addition and subtraction is allowed on the following data types: Integers, Strings and String Lists.
The following • Integer operations: Addition operations corresponds to addition in mathematics and subtraction operations corresponds to subtraction in mathematics. • String operations: Addition operations will concatenate the strings and the subtraction operations will the remove all occurrences of the latter string from the former string. E.g. “sdadf”-“df”=”sa” • String List Operations: Addition operations and subtraction operations corresponds to the union and difference operations in set theory respectively. E.g. List1 = {"A", "B", "C"} List2 = {"C", "D" and "E"}. List1+List2 = {"A", "B", "C", "D", "E"} and List1-List2={"A","B"}
The application uses a Factory Method Design Pattern to decide which types of operations to execute. Both factories are implemented as Singleton design patterns.