Write a C++ program to create a class result that has an array of three integers as attributes. It has a member function to input and a member function to display the "average of elements". Create...

Write a C++ program to create a class
result
that has an array of three integers as attributes. It has a member function to
input
and a member function to
display
the "average of elements".

Create another class
student
that contains an object of the class 'result'. It has additional attributes of
roll number
and
name. It also has member functions to
input
and
display
the data members.