Class Point:: It holds co-ordinates of a point in format (x,y)

A class Named "Point" which stores the Co-ordinates of a point in (x,y) Format.

This Class Contains::

O Constructor with default arguments

O Copy Constructor

O Function to display which Co-ordinate a Point belongs to

O Function to get value of x of a point

O Function to get value of y of a point

O Function to get the Radious Vector (r) of a point

O Function to get the Theta of a point

O Overloaded Operator - to find out distance between two points

O Overloaded Operator >> to take input

O Overloaded operator << to display a point

O Destructor

#include<iostream.h>
#include<math.h>

class point{

 //Data Members

 int x,y;    //They hold the value of X and Y co-ordinate of a Point.

 public:

 //Member Functions

 point(int t1=0, int t2=0)  //Constructor with default arguments.
 {
  x=t1;
  y=t2;
 }

 point(point &t)  //Copy Constructor
 {
  x=t.x;
  y=t.y;
 }

 int coordinate(void);  //It returns the point's Co-ordinate, e.g., 1, 2, 3, or 4th.

 int getx(void){ return x; }  //It returns the value of X co-ordinate of a point.

 int gety(void){ return y; }  //It returns the value of Y co-ordinate of a point.

 double r(void){ return sqrt((x*x)+(y*y)); }  //It returns the Radius Vector of a point.

 double theta(void){ return atan(y/x); }  //It returns the Vectorial Angle of a point.

 double operator -(point &t)  //Overloading of operator -- to find the distance between two points.
 {
  return sqrt(pow(x-t.x,2)+pow(y-t.y,2));
 }

 friend istream& operator >> ( istream &in, point &t );  //Take input a point using the line cin>>point_object;

 friend ostream& operator << ( ostream &out, point &t);  //Give output of a point using the line cout<<point_object;

 ~point(void)  //Destructor
 {
  cout<<"\nThis point is destructed";
 }

};


int point:: coordinate(void)
{
 int a;
 if(y>=0)
  if(x>=0) a=1; else a=2;
 else
  if(x<0) a=3; else a=4;
 return a;
}

istream& operator >> (istream &in, point &t)
{
 cout<<"\nINPUT X::";
 in>>t.x;
 cout<<"INPUT Y::";
 in>>t.y;
 return in;
}

ostream& operator << (ostream &out, point &t)
{
 out<<"( "<<t.x<<","<<t.y<<" )";
 return out;
}


void main()
{
 point a(-3,-4);
 cout<<"\nPoint:: "<<a;
 cout<<"\nThe Co-ordinate of this Point:: "<<a.coordinate();
 cout<<"\nValue of X Co-ordinate:: "<<a.getx();
 cout<<"\nValue of Y Co-ordinate:: "<<a.gety();
 cout<<"\nPolar Co-ordinates(in r,theta form):: ( "<<a.r()<<","<<a.theta()<<" )";
 point b;
 cin>>b;
 cout<<"\nDistance of point "<<a<<" from "<<b<<" :: "<<a-b;
 point c(b);
 cout<<"\nCopy of "<<b<<" is "<<c;
}