Help with Cartesian Class

[lizardqueen]

I am trying to make a cartesian class which allows the user to input two coordinates, displays the coordinates, and uses memberwise assignment to assign the values of the first object to the second object. When I try to run my program I get the following errors
prog.cpp: In function ‘int main()’:
prog.cpp:47:16: error: ‘class Cartesian’ has no member named ‘a’
cin >> coord1.a;
^
prog.cpp:49:16: error: ‘class Cartesian’ has no member named ‘b’
cin >> coord1.b;
^
prog.cpp:51:16: error: ‘class Cartesian’ has no member named ‘a’
cin >> coord2.a;
^
prog.cpp:53:16: error: ‘class Cartesian’ has no member named ‘b’
cin >> coord2.b;
^

How can I fix this? Also, I'm a little confused as to how to go about writing the code for the memberwise assignment. Any suggestions?

#include <iostream>
#include <istream>
#include <ostream>

using namespace std;

class Cartesian
{
private:
double x;
double y;
public:
Cartesian( double= 0, double= 0);
friend istream& operator>>(istream&, Cartesian&);
friend ostream& operator<<(ostream&, const Cartesian&);

};

Cartesian::Cartesian(double a, double b)
{
    x=a;
    y=b;
}

istream& operator>>( istream& in, Cartesian& num)
{
	double a, b;
	in >> a;
	in >> b;
    num.x= a;
	num.y= b;

return in;
}

ostream& operator<<( ostream& out, const Cartesian& num)
{
	cout << "(" << num.x << ", " << num.y << ")" << endl;

return out;
}

int main()
{
	Cartesian coord1, coord2;
    cout << "Please enter the first x-coordinate: ";
	cin >> coord1.a;
	cout << "Please enter the first y-coordinate: ";
	cin >> coord1.b;
	 cout << "Please enter the second x-coordinate: ";
	cin >> coord2.a;
	cout << "Please enter the second y-coordinate: ";
	cin >> coord2.b;
	

	cout << coord1;
	cout << coord2;

	
	
	return 0;
}
}

[iQChange]

If you had not created these members, how would you access them?

#include <iostream>
#include <istream>
#include <ostream>

using namespace std;

class Cartesian
{
private:
double x;
double y;
public:
Cartesian( double= 0, double= 0);
friend istream& operator>>(istream&, Cartesian&);
friend ostream& operator<<(ostream&, const Cartesian&);

};

x and y, no a and b

[lizardqueen]

How do I create them as members?

[iQChange]

Like x and y, but then you'll have to change your methods (functions inside the class)

[lizardqueen]

Okay so I changed my code and it runs but it doesn't ask for user input. What's wrong with it?

#include <iostream>
#include <istream>
#include <ostream>

using namespace std;

class Cartesian
{
private:
double x;
double y;
public:
Cartesian( double= 0, double= 0);
friend istream& operator>>(istream&, Cartesian&);
friend ostream& operator<<(ostream&, const Cartesian&);
}
;

Cartesian::Cartesian(double a, double b)
{
    x=a;
    y=b;
}

istream& operator>>( istream& in, Cartesian& num)
{
    in >> num.x;
	in >> num.y;
    

return in;
}

ostream& operator<<( ostream& out, const Cartesian& num)
{
	cout << "(" << num.x << ", " << num.y << ")" << endl;

return out;
}

int main()
{
	Cartesian coord1, coord2;
	cout << "Please enter the first coordinates in the form x y: ";
	cin >> coord1;
	cout << "Please enter the second coordinates in the form x y: ";
	cin >> coord2;
	cout << coord1;
	cout << coord2;

	
	
	return 0;
}