Print adress iinsted of values

[ebii]

any can see the mistake i done?
why its printing the adress and not values?
i try to done double pointer like pointer to array of object like in darje post.

  #pragma once
#include<iostream>
#include<cassert>
using namespace std;
class Point {
	int x;
	int y;
public:
	Point() :x(0), y(0) {}
	Point(int a, int b) :x(a), y(b) {}
	Point(const Point &p) {
		x = p.x;
		y = p.y;
	}
	Point operator=(const Point &o) {
		x = o.x;
		y = o.y;
		return *this;

	}
	friend ostream &operator<<(ostream &out, const Point &p) {
		out << "(" << p.x << "," << p.y << ")" << endl;
		return out;
	}
};
class Cpoint {
	int size;
	Point ** ptr;
public:
	Cpoint(int size) {
		this->size = size;
		ptr = new Point*[size];
		assert(ptr != NULL);
	}
	~Cpoint() {
		for (int i = 0; i < size; i++) {
			delete[] ptr[i];
		}
		delete[]ptr;
	}
	void set(int index, const Point &p) {
		if (size > index) {
			ptr[index] = new Point(p);
		}

	}
	friend ostream &operator <<(ostream &out, const Cpoint &p) {
		for (int i = 0; i < p.size; i++) {
			out << p.ptr[i] << endl;
		}
		return out;
	}




};
int main() {
	Point a(1, 3);
	Point b(2, 4);
	Cpoint cpoint(2);
	cpoint.set(0, a);
	cpoint.set(1, b);

	cout << cpoint;

	system("pause");
	return 0;

}

[Chervil]

In class Cpoint you create an array of pointers to objects. It might be simpler to just create an array of objects:

class Cpoint {
    int size;
    Point * ptr;
    
public:
    Cpoint(int size) {
        this->size = size;
        ptr = new Point[size];
        assert(ptr != NULL);
    }
    
    ~Cpoint() {
        delete[]ptr;
    }
    
    void set(int index, const Point &p) {
        if (size > index) {
            ptr[index] = p;
        }
    }
    
    friend ostream &operator <<(ostream &out, const Cpoint &p) {
        
        for (int i = 0; i < p.size; i++)
            out << p.ptr[i] << endl;

        return out;
    }
};

Alternatively, you'd need to dereference the pointers before use, but I'm not sure there's any benefit in doing things that way.

[ebii]

isnt pointer to array that hold an objects?

void set(int index, const Point &p) {
		if (size > index) {
			ptr[index] = new Point(p);
		}

	}

[Chervil]

ptr is a pointer to an array of pointers.
ptr[i] is a pointer.

In your original code, you'd need to dereference the pointer like so:

    friend ostream &operator <<(ostream &out, const Cpoint &p) {
        for (int i = 0; i < p.size; i++) {
            out << *p.ptr[i] << endl; // need to dereference pointer here
        }
        return out;
    }

[ebii]

Thanks my friend its helpd me alot.
do you know where i can find alot of exersice in c++ ? like folowing output of program with interhance/virtual function/exceptions ?