C++ for-loop structure with multiple variable initialization

Question

On the 2nd for-loop, I get the following error from gcc:

error: expected unqualified-id before \'int\'

I\'m not sure what I\'m missing. I\

Answer 1

Don't declare int after comma use,

for (int i = 0,col = 0; i < values.size(); i++, col++) {
  if (col > 10) { std::cout << std::endl; col == 0; }
  std::endl << values[i] << ' ';
  }
}