c++ program. please have it run for visual studio. thank you

Implement the following three classes:

Ia. with the following members: a. , a private member of type b. , a private member of type c. , a friend function to change the values of and d. , a friend function and a member of the class . It returns the (diameter/2).

1b with the following members: a. , a private member of type b. , a private member of type c. , a friend function to change the values of and d. , a friend function and a member of the class . It returns the (diameter/2).

1c. with the following two members: a. , a friend function of class . It returns the class (i.e. ) b. , a friend function of class . It returns the class (diameter/2).