C++ :: Cartesian Class - Display Coordinates Entered By User

I am trying to make a program with a Cartesian class that allows the user to enter 2 coordinates and displays these coordinates. When I try to compile it, I get a message saying the x and y in x=c and y=d don't name a type. How can I fix this? Also, how would I go about inserting an assignment function that assigns the values of coord1 to coord2?

Code:
#include <iostream>
#include <istream>
#include <ostream>
using namespace std;
class Cartesian {
private:
double x;
double y;

[Code] ....