MyString class In this assignment, you are to create MyString class that supports custom operators, such as addition, equality, and stream in and extraction. Following describes the member functions and operators of the Mystring class: I default constructor // constructor: creating a string from a char // constructor: creating a string from C.string // copy constructor /I destructor .MyString); MyString(const char sre); MyString(const chan* src) ystrings src), . MyString); // getter // getter // setter // copy assignment operator /I copy assignment operator /I copy assignment operator // addition operator / addition operator int Getlength() const char GetCharAt (int index) const; void SetCharAt (int index, char ch) const Mystrings operator (const char rhs); MyStrings operator- (const char rhs); . .MyString& operator (const MyString& rhs); MyString operator+ (const char* rhs) const; . Mystring operator+ (const MyString& rhs) const; / addition operator MyString operator+ (const char rhs) const; // addition assignment operator I addition assignment operator // addition assignment operator /I equal-to operator II equal-to operator // not-equal-to operator // not-equal-to operator MyString& operator+ (const char rhs); .MyString& operator+.(const char* rhs); MyString& operator+-(const MyString& rhs): bool operator.(const HyString& rhs) const; .bool operator-(const char* rhs) const; . bool operatorl-(const MyString& rhs) const; bool operator!-(const char* rhs) const; friend ostream operator> (istream& is, MyString& str) / stream extraction operaton You are provided with three startup files: /hone/cmpsc122/s19/hw3/mystring.h /home/cmpsc122/s19/hw3/mystring.cxx /home/cmpsc122/s19/hw3/testmystring.cxx mystring.h has the class declaration, nystring.cxx has the implementation of member functions and operators, and testmystring.cxx has the main program that tests your MyString class. In this assignment, you have to complete the implementation of the member functions and operators in mystring.exx. Do not change any code in mystring.h and testmystring.cxx. To compile and run the program, use the following commands: s 8++ -ansi -pedantic -Wall mystring.cxx testmystring.cxx -o testmystring s./testmystring If you pass all tests in testmystring.exx, the following messages will be printed at the end of its output Congratulation! Your program passed all 30 test cases Otherwise, the program will output the number of test cases your program failed