/* *

• • Mathematical set program

• This program takes the union, intersection and difference of two sets.
  

• Included are several methods:
  

•  - Contains method: checks if element exists in set
  

•  - Add method: adds element to set
  

•  - Remove method: removes element from set
  

•  - isEmpty method: checks if set is empty
  

•  - Clear method: clears all elements in set by overwriting with zeros
  

•  - Size method: returns size of set
  

•  - Union method gathers all elements of two sets
  

•  - Intersection method gathers only common elements to two sets
  

•  - Difference method gathers all uncommon elements between two sets
  

• */