In mathematics, a set is a group of distinct items. Design and implement (using an array)...

+createSet()

// creates an empty set

tisEmpty()iboolean {query}

// Determines whether a set is empty

+size():integer {query}

// Returns the number of elements in this set (its // cardinality)

+add(in item:integer)

// Adds the specified element to this set if it is not already // present *

+contains(in item:integer):boolean {query}

// Determines if this set contains the specified item tunion(in other:Set):Set

// Creates a new set containing all of the elements of this // set and the other set (no duplicates) and returns the // resulting set

+intersection(in other:Set):Set

// Creates a new set of elements that appear in both this set // and the other set and returns the resulting set

+removeAll()

// Removes all of the items in the set