Using the Point Class - C++

My assignment is to write a definition of a class named Point used to store and manipulate the location of a point in a plane. You need to declare and implement the following member functions:
1 - a member function set that sets the private data after an object of this class is created.
2 - a member function to move the point by an amount along the vertical and horizontal directions  specified by the first and second arguments.
3 - a member function to rotate the point by 90 degrees clockwise around the origin.
4 - two const inspector functions to retrieve the current coordinates of the point.
Embed your class in a test program that requests data for several points from the user, creates the points, then exercises the member functions.

Here is my code below: I am just trying to get it to work. I can work out the test program later..
Right now I am getting 3 errors.. Please help...

Code:

#include <iostream>
#include <cstdlib>

using namespace std;

class Point
{
public:
      Point();
      //member functions  
      void setPoints(double& set_x, double& set_y);
      //void setPointY(double set_y);
      void movePoints(double& move_x, double& move_y);
      void rotatePoints();
      double get_x()const;
      double get_y()const;
      
      //member variables
private:
      double x, y;
      double adjY, adjX;  
};      
int main()
{
      double x1, y1;
      
      setPoints (x1, y1);
      movePoints(x1, y1);
      rotatePoints();

      return 0;
}
Point::Point()
{
      x=0;
      y=0;
}
void Point::setPoints(double& new_x, double& new_y)
{
      x = new_x;
      y = new_y;

      cout << "Enter the X coordinate:" << endl;
      cin >> x;
      cout << "Enter the Y coordinate:" << endl;
      cin >> y;
}
void Point::movePoints(double& move_x, double& move_y)
{        
      x = x+move_x;
    y = y+move_y;

      cout << "Enter the new X coordinate:" << endl;
      cin >> x;
      cout << "Enter the new Y coordinate:" << endl;
      cin >> y;
      cout << "The new position of the coordinates is:"<<endl;
      cout << get_x()<< ""<<get_y()<<endl;
}
void Point::rotatePoints()
{
 adjX = -y;
 adjY = x;
 cout << "Enter the adjusted x coordinate:" <<endl;
 cin >> adjX;
 cout << "Enter the adjusted y coordinate:" <<endl;
 cin >> adjY;
 
}
double Point::get_x()const
{       
      return x;
}
double Point::get_y()const
{
      return y;
}