Question:

Write a C$++$ program that creates a class Rectangle with two private data members length and width. The class should have:

A constructor to initialize the length and width.

A member function area$()$ that returns the area of the rectangle.

A member function perimeter$()$ that returns the perimeter of the rectangle.

A function compareArea$($Rectangle &other$)$ that compares the area of the current rectangle with another rectangle and returns:

$1$ if the current rectangle's area is larger,

$-1$ if the current rectangle's area is smaller,

$0$ if both areas are equal.

Write a main function to demonstrate the use of this class by creating two Rectangle objects, comparing their areas, and displaying the result.