Inheritance Lab

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1. use this Circle class code
2. Clean up the code so it compiles and runs for you
3. Modify the program to include a derived class Cylinder
4. Create a constructor for cylinder
5. Create a calcval() method for cylinder
   Return the volume of the cylinder
   Note: volume is length * PI r²
6. Undocument the code and test the cylinder
7. Check your code using this
8. Modify the program to include a derived class Sphere
9. Create a constructor for sphere
10. Create a calcval() method for sphere
    Return the volume of the sphere
    Note: volume is 4/3PI r³
11. Create a main program to test your code
    Solution