need help on c++ programming please

here's the code given:

I have provided a basic testing program, TestThePoly.cpp, and a header file Polynomial.h, for a polynomial class named Polynomial. Your job is relatively easy: complete the class declaration in the header and then implement (in a matching .cpp file) the functions that are declared in the header file and test them to ensure they work as advertised The testing program supplied is very basic. You will be expected to modify it and add some (two or three at least) more tests to ensure that all aspects of the new class are exercised For those who may be confused, the degree" of a polynomial is the highest degree (expo- nent) of its terms. For instance 3+3r2 +0.3x-1.54 is a polynomial of degree 3. Note: In this example there is one more term than the degree of the polynomial. Further note: There is always one more term than the degree of the polynomial. The exponents on some of the terms may simply be 0 1. The declaration should match the interface shown in the provided incomplete header file Polynomial.h. Please understand that the actual structure of the private mem- bers and functions of this class are up to you to design. Also, the degree of the polynomial can be any nonnegative integer value (from 0 up to "the sky is the limit") 2. The behavior of the class and its methods should duplicate that shown by the example test application TestThePoly.cpp. Its associated program output is at the end of this file