Specify and implement an ADT character string by using a linked chain of characters. Include typical operations such as finding its length, appending one string to another, finding the index of the leftmost occurrence of a character in a string, and testing whether one string is a substring of another.

Program must compile and run. Create an ADT character string as a class that uses a linked list of each character. Do not use any STL container for the internal data structure. The LinkedChar class minimally has the methods in the UML diagram below. You can add more methods. Main function will have a menu of options. Enter new string and store as linked list of characters in an ADT LinkedChar class Get current length (number of characters stored) from the LinkedChar Find index of character in this LinkedChar Append another LinkedChar to this LinkedChar (no shallow copy) Test if another LinkedChar is submatch of this LinkedChar Quit

LinkedChar LinkedChar(); LinkedChar(const std::string s); int length() const; int index(char ch) const; // -1 if no match void append(const LinkedChar& Ic); bool submatch(const LinkedChar& Ic) const; LinkedChar LinkedChar(); LinkedChar(const std::string s); int length() const; int index(char ch) const; // -1 if no match void append(const LinkedChar& Ic); bool submatch(const LinkedChar& Ic) const