C++

LAB9 : Re-write your derived classes from Lab 8 to override a pure virtual function in the base class to compute the area of the shapes. Re-write the application from Lab 8 to create and store input shapes as base class pointers. In addition, modify the application to allow the user to create and store any number of shapes (use an STL class to store the base class pointers, i.e. vector shapes). After the user has finished creating shapes, compute and print the area for all the shapes in a single loop using only the base class pointers with dynamic binding.

Here is the Lab 8 prompt:

Design and write classes in a class hierarchy to describe different types of geometric shapes. Provide information in the classes in order to compute the area of each of the shapes. Create three separate classes (Triangle,Rectangle,Circle) that are derived from a separate base class (Shape). Write a program that allows a user to create any of the different shape types. Prompt the user to select the shape type and enter the necessary dimensions (i.e. refer to formulas below; rectangle needs width and height, circle needs radius, triangle needs height and base). After the user has finished creating the shape, compute and print out the area.

Use the following formulas for your program:

Triangle:	area = * base * height
Rectangle:	area = width * height
Circle:	area = PI * radius2

Please make sure to follow the lab9 guidelines

Thanks