各種程式坑集合

  // vector is empty
  int i = 4;
  if (0 <= i && i <= vector.size() - 1)
    cout << vector.size() << endl;
  cout << i << endl;

#define max(a, b) ((x) > (y) ? (x) : (y))

void example()
{
  int x = 2, y = 10;
  int z = max(x, ++y) 
}