Q/ write C++ program to create class called grades that has data members Degl, Deg2, and Deg3, also has a constructor to assign values, method to find the average of degrees, also method to display...

Extracted text: Q/ write C++ program to create class called grades that has data members Degl, Deg2, and Deg3, also has a constructor to assign values, method to find the average of degrees, also method to display values, and method to decrement the degrees by one using overloaded decrement operator.