C$++\_$Overloading Extraction and Insertic Operator

Given three classes $-$Point, Rectangle and Triangle described as follows:

class Point $\{$

int $x,y,z$;

$\}$;

class Rectangle $\{$

int length, breadth;

$\}$;

class Triangle $\{$

int base, height;

$\}$;

Overload the insertion and the extraction operators such that one can;

input all the data members of an object of any of these classes using insertion operator.