Question

C++

Define a C++ abstract class named shape. The class will have attributes for the sides of the shape. The class will also need the accessor method getSide that returns the sides of the shape. The class also needs one mutator method called setSides which will set the sides of the shape. The setSides method should return a Boolean value indicating if the set was successful or not and update the sides accordingly. (You cannot have a 0 or negative side.)

You will need to do the class declaration in a header(.h) file and the class implementation in the .cpp file.

Also add two more methods in the class namely getArea andgetPerimeter to calculate the area and perimeter of the shape. Define a method Display() for this class to print the sides of the shape on the screen.

Answer 1

#include <iostream>
using namespace std;

// shape is square
class shape
{
  int side;

  public: int getSide()
          {
            return side;
          }

          bool setSides(int s)
          {
            if(s > 0)
            {
              side = s;
              return true;
            }
            else
              return false;
          }

          int getArea()
          {
            return side*side;
          }

          int getPerimeter()
          {
            return side*4;
          }

          void display()
          {
            cout<<"Side: "<<getSide()<<endl;
            cout<<"Area: "<<getArea()<<endl;
            cout<<"Perimeter: "<<getPerimeter();
          }
};

int main()
{
  shape S;
  int num;

  cout<<"Enter side: ";
  cin>>num;

  if(!S.setSides(num))
    cout<<"Entered side is not valid
";

  S.display();

  return 0;
}