Group 14 (50,52,54,56)

oops_assignment_series_1.cpp

/*
Group 14 (50,52,54,56)

Create a class to hold a point containing member variable to store x and y co-ordinates. Add
necessary member functions to initialize, set and to get values.

Create a class to represent rectangle that contains member variables to hold two instances of point
(top left and bottom right point).Add necessary member function to handle rectangle instance.
Implement a main() to create as many instances of rectangle as per user’s choice dynamically.
Then calculate the perimeter of those rectangles.
Formula is 2(length + breadth).

Then add a global function sort to arrange to display those instances in descending order on the
basis of their perimeter.
*/

#include<iostream>
#include<math.h>
using namespace std;

class Point{
	float x,y;
public:
	void setValue(){
		cin>>x>>y;
	}

	float getX(){
		return x;
	}

	float getY(){
		return y;
	}
};

class Rectangle{
public:
	Point p1,p2;

	Rectangle(Point a, Point b){
		p1 = a;
		p2 = b;
	}

	//calculates the origin and the perimeter
	float calculatePerimeter(){
		return 2 * (abs(p1.getX()-p2.getX()) + abs(p2.getY()-p1.getY()));
	}
};

void sort(Rectangle *rect_list[], int n){
	for(int i=0; i<n; i++){
		for(int j=i+1;j<n;j++){
			if(rect_list[i]->calculatePerimeter() < rect_list[j]->calculatePerimeter()){
				Rectangle *temp = rect_list[i];
				rect_list[i] = rect_list[j];
				rect_list[j] = temp;
			}
		}
	}

	cout<<endl<<"Descending sorted Rectangles"<<endl;
	for (int i = 0; i < n; ++i)
	{
		cout<<"("<<rect_list[i]->p1.getX()<<","<<rect_list[i]->p1.getY()<<")"
		<<","<<"("<<rect_list[i]->p2.getX()<<","<<rect_list[i]->p2.getY()<<")"
		<<" Perimeter: "<<rect_list[i]->calculatePerimeter()<<endl;
	}
}

int main()
{	
	int n;
	cout<<"Enter number of rectangles: ";
	cin>>n;

	Rectangle *rect_list[n];

	Point p1,p2;
	for(int i= 0; i < n; ++i){
		cout<<"Enter points for rectangle "<<(i+1)<<" : ";

		p1.setValue();
		p2.setValue();

		rect_list[i] = new Rectangle(p1,p2);
	}

	sort(rect_list,n);
	return 0;
}

INPUT:
3
1 5 5 2
0 1 2 0
0 4 6 0

OUTPUT Screenshot:

PROGRAM:
Enter number of rectangles: 3
Enter points for rectangle 1 : 1 5 5 2
Enter points for rectangle 2 : 0 1 2 0
Enter points for rectangle 3 : 0 4 6 0

Descending sorted Rectangles
(0,4),(6,0) Perimeter: 20
(1,5),(5,2) Perimeter: 14
(0,1),(2,0) Perimeter: 6