#include <iostream>
using namespace std;

//Suuruskontrolliga massiiv
template<class T>
class Massiiv {
  static const int suurus=100;
  T A[suurus];
public:
  T& operator[](int indeks) {
    if(indeks < 0 || indeks >= suurus){
      cout << "vigane indeks\n"  << endl;
      exit(1); //automaatne katkestus
    }
    return A[indeks];
  }
};

struct mPunkt{
  int x, y;
};

int main() {
  Massiiv<mPunkt> pm;
  for(int i = 0; i < 10; i++) {
    pm[i].x = i;
    pm[i].y = i*i;
  }
  for(int j = 0; j < 10; j++)
    cout << j << ": " << pm[j].y << endl;
} 

/*
D:\kodu\0309\oma>a
0: 0
1: 1
2: 4
3: 9
4: 16
5: 25
6: 36
7: 49
8: 64
9: 81
*/