#include <iostream>
using namespace std;
#include "prompt.h"

struct Pair
{
  int x, y;
  Pair(int a, int b)
    : x(a), y(b)
  {  ourCount++;}
  
  static int ourCount;
};

int Pair::ourCount = 0;

int main()
{
    Pair p(0,0);
    int k,limit = PromptRange("number of pairs? ",1,20000);
    for(k=0; k < limit; k++)
    {   Pair p(k,2*k);
    }
    cout << "# pairs created = " << Pair::ourCount << endl;
    return 0;
}