#include <iostream>

using namespace std;

class row
{
private:
    int len, *ptr;
public:
    // constructor
    row(int n=3) {
        len = n;
        ptr = new int[n]; // use [] to make ptr point to an ARRAY of ints
        for(int i=0;i<len;i++) {
            ptr[i] = i;
        }
    }// row()

    // destructor
    ~row() {
        delete[] ptr; // [] needed, since we are deleting a ptr to an ARRAY
    }// row()

    // print method
    void printRow(string label);
}; // class row

void row::printRow(string l)
{
    cout << l;
    for(int i=0; i<len; i++)
    {
        cout << ptr[i] << " ";
    }
    cout << endl;
}// printRow()

void twoRows(){

    row r,s(10);

    s.printRow("s: ");
    r.printRow("r: ");
}// twoRows()

int main()
{
    twoRows();
    return 0;
}