Write a string class. to avoid conflicts with other similarly named classes, we will call our version mystring. this object is designed to make working with sequences of characters a little more convenient and less error-prone than handling raw c-strings, (although it will be implemented as a c-string behind the scenes). the mystring class will handle constructing strings, reading/printing, and accessing characters. in addition, the mystring object will have the ability to make a full deep-copy of itself when copied.