Composition

[ebii]

im having a diffcult time to understand this copmosition for some reason
be happy if someone can direct me

#include<iostream>
using namespace std;

class point{
	int x, y;
public:
	point (int xx, int yy) :x(xx), y(yy) {}

};
class x:public point {
	point* nums;
	int size;
public:
	x(int a,int b):point(a,b){
		

	}


};
int main() {
	point p1(1, 1);
	point p2(2, 2);
	x b(p1, p2);



	system("pause");
	return 0;
}

how do i do when i make new X object like put few point like x(p1,p2)?
open new array ? when i call x object?

[MikeyBoy]

OK, I'm not understanding your design here. x inherits from point, which means that it is a point. But x also contains what appears to be an array of points. Why?

[ebii]

hey mike
i want to make x object that contains serveal point .
x(point1,point2)\i might be confued about what i try ..

[MikeyBoy]

Then there's no reason for x to inherit from point. I'm guessing you haven't understood what inheritance is, or when to use it. You probably want to go back to your textbook and reread about inheritance.

[ebii]

ok still you didnt direct me how to solve it.

[keskiverto]

You want an object that contains several points. A container. C++ Standard Library has container.
For example: http://www.cplusplus.com/reference/vector/vector/vector/

Your thread title is "composition", not "inheritance". While it is good for to reread the inheritance material, you should read about composition too.
For example: http://www.learncpp.com/cpp-tutorial/102-composition/

[ebii]

thanks alot kesk but i mange to understand what was wrong without using vectors.
tnx mate (: