#include<iostream>
using namespace std;
//----------------------
class Vector{
	int size;
	int *buffer;
public:
	Vector(int s=100);
	Vector(const Vector& n);
	int &elem(int ndx);
	void display();
	void set();
	~Vector();
};
//----------------------
Vector::Vector(int s){
	buffer=new int[size=s];
	for(int i=0;i<size;i++)
		buffer[i]=i*i;
}
//----------------------
Vector::Vector(const Vector& n){
	buffer=new int[size=n.size];
	for(int i=0;i<size;i++)
		buffer[i]=n.buffer[i];
}
//----------------------
int& Vector::elem(int ndx){
	if(ndx<0||ndx>=size){
		cout<<"error in index"<<endl;
		exit(1);
	}
	return buffer[ndx];
}
//-----------------------
void Vector::display(){
	for(int j=0;j<size;j++)
		cout<<buffer[j]<<endl;
}
//-----------------------
void Vector::set(){
	for(int j=0;j<size;j++)
		buffer[j]=j+1;
}
//-----------------------
Vector::~Vector(){delete[]buffer;}
//-----------------------
void main(){
	Vector a(10);
	Vector b(a);
	a.set();
	b.display();
}