Question

Write a main function that declares two rectangle object as follows:
The first name rect1 is created using the overridden default constructor.
The second named rect2 has a height of 5 and width of 10 assigned by the parameterized constructor.
Use setWidth and setHeight to assign rect1 a width of 100 and height of 25 respectively.
Call computeArea and computePerimeter for each rectangle object.
Call getArea and getPerimeter and display the area and perimeter of each rectangle.

Answer 1

#include<iostream>
using namespace std;
class Rectangle{
	private:
		int width, height, area, perimeter;
	public:
		Rectangle(){
			width = 0;
			height = 0;
			area = 0;
			perimeter= 0;
		}
		Rectangle(int w, int h){
			width = w;
			height = h;
			area = 0;
			perimeter = 0;
		}
		
		void setWidth(int w){
			width = w;
		}
		void setHeight(int h){
			height = h;
		}
		
		
		int getArea(){
			return area;
		}
		
		int getPerimeter(){
			return perimeter;
		}
		void computeArea(){
			area = height * width;
		}
		void computePerimeter(){
		perimeter = 2 * (width + height);


		}
		
		
};


int main(){
	Rectangle rect1;
	Rectangle rect2(5,10);
	
	rect1.setWidth(100);
	rect1.setHeight(25);
	
    rect1.computeArea();
    rect1.computePerimeter();
    
    rect2.computeArea();
    rect2.computePerimeter();
    cout<<"Rectangle rect1\n";
    cout<<"The area of the rectangle:  "<<rect1.getArea()<<endl;
    cout<<"The perimeter of the rectangle:  "<<rect1.getPerimeter()<<endl;
    
    cout<<"Rectangle rect2\n";
    cout<<"The area of the rectangle:  "<<rect2.getArea()<<endl;
    cout<<"The perimeter of the rectangle:  "<<rect2.getPerimeter()<<endl;
    
}