Lesson 10

Labs

Problem 1:

12.10 (Shape Hierarchy) Implement the Shape hierarchy of Fig. 11.3. Omit the Triangle and Tetrahedron classes. Each TwoDimensionalShape should contain read-only abstract property Area to calculate the area of the two-dimensional shape. Each ThreeDimensionalShape should have readonly abstract properties Area and Volume to calculate the surface area and volume, respectively, of the three-dimensional shape. Create an app that uses an array of Shape references to objects of each concrete class in the hierarchy. Display a text description of the object to which each array element refers. Also, in the loop that processes all the shapes in the array, determine whether each shape is a TwoDimensionalShape or a ThreeDimensionalShape. If a shape is a TwoDimensionalShape, display its area. If a shape is a ThreeDimensionalShape, display its area and volume.


Problem 2:

Build the following: