Answer to Question #250519 in C++ for Love

Question

Creat a class named Rectangle with integer instance variables named width, height, area and perimeter. Override the default constructor and use it to set these variables to zero. Also include another constructor that accepts perimeters for the width and height instance variables and initializes the instance variables area and perimeter to zero.
Include the following accessor and mutator methods;
I) setWidth which accepts a parameter that can be used to assign the width instance variable.
2) setHeight which accepts a parameter that can be used to assign the height instance variable.
3) getArea that returns the value of area instance variable.
4) getPerimeter that returns the value of perimeter instance variable.

Also include following custom methods:
1) computeArea which computes a rectangle's area but doesn't return a value
2) computePerimeter Which computes a rectangle's perimeter and also doesn't return a value.

Answer 1

#include<iostream>
using namespace std;
class Rectangle{
	private:
		int width, height, area, perimeter;
	public:
		Rectange(){
			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 rec(8,8);
    rec.computeArea();
    rec.computePerimeter();
    cout<<"The area of the rectangle:  "<<rec.getArea()<<endl;
    cout<<"The perimeter of the rectangle:  "<<rec.getPerimeter()<<endl;
    
}