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CS205_C_CPP_Lab13

  1. Design a stereo graphics class ( CStereoShape class), and meet the following requirements:
  • A virtual function GetArea , which can get the surface area of the stereo graphic, Here we let it print out CStereoShape::GetArea() and return a value of 0.0, which means that CStereoShape 's GetArea is called.
  • A virtual function GetVolume , which can get the volume of the stereo graphic, Here we let it print out CStereoShape::GetVolume() and return a value of 0.0, which means that CStereoShape 's GetVolume is called.
  • A virtual functionShow, which print out the description of the stereo graphics. But here we let it print out CStereoShape::Show() , which means that Show of CStereoShape is invoked.;
  • A static private integer variable named numberOfObject , whose initial value is 0, which denotes the number of Stereo graphics generated by our program.
  • A method named GetNumOfObject() that returns the value of numberOfObject.
  • Add constructor functions based on requirement
  1. Design a cube class ( CCube class), which inherits the CStereoShape class and meets the following requirements:
  • A no-arg constructor that creates a default Cube.
  • A constructor with parameters whose parameters correspond to the length, width, and height of the cube, respectively.
  • A copy constructor that creates a Cube object with the specified object of Cube .
  • Override GetArea 、GetVolume of the CStereoShape class to complete the calculation of the surface area and volume of the cube, respectively.
  • Override Show() of the CStereoShape class to print out the description (includes length, width, height, the surface area and volume )for the Cude object.
  1. Design a sphere class ( CSphere ), which inherits from the StereoShape class and meets the following requirements:
  • A no-arg constructor that creates a default Sphere.
  • A constructor with parameters whose parameters correspond to the radius of thesphere.
  • A copy constructor that creates a Sphere object with the specified object of Sphere.
  • Override the GetArea and GetVolume of the CStereoShape class to complete thecalculation of the surface area and volume of the sphere, respectively.
  • Override Show() of the CStereoShape class to print out the description (includesradius, the surface area and volume )for the Sphere object.
  1. Write a test program and complete at least the following tasks in the main functions:

  • Create a CCube object named a_cube, which the length, width and height are 4.0, 5.0, 6.0 respectively.

  • Create a CSphere object named c_sphere, which radius is 7.9.

  • Define the CStereoShape pointer p, point p to a_cube, and then print the information of a_cube to the terminal by p;

  • Point p to c_sphere, then print the information of c_sphere to the terminal by p.

  • Prints out the number of Stereo graphics created by the test program

  • Note that You may need to use the setf () and precision () formatting methods to set the output mode.