#include <cstdio>

template <int N>
class SafeArray
{
public:
  int& operator[](int idx);

private:
  int mValues[N];
  int zeroValue;
};

template <int N>
int& SafeArray<N>::operator[](int idx)
{
  if(idx < 0 || idx >= N){
    printf("NOOOOO!\n");
    zeroValue = 0;
    return(zeroValue);
  }
  else{
    return(mValues[idx]);
  }
}


int main(int argc, char* argv[])
{
  SafeArray<10> vals;
  for(int i = -2; i <= 10; i++){
    vals[i] = i;
  }

  for(int i = -2; i <= 10; i++){
    printf("vals[%d] = %d\n", i, vals[i]);
  }

  return(0);
}