Question

I gave up on trying to pass a 2d array to a function, where the dimensions are not known at compile time. After some research, it seems like a 2d vector may be a good substitute. I just want to confirm that this is the correct way to declare a 2d vector of dimension totalRows X totalColumns, initializaing each cell to contain the space character:

vector<vector<char> > world(totalRows, vector<char>(totalColumns, ' '));

Answer 1

Your code works. As noticed in the comment, vector<vector<T>> is not truly a 2D array.

The important thing here is that (totalRows, vector<char>(totalColumns, ' ')) and (totalColumns, vector<char>(totalRows, ' ')) are equivalent, as long as you always follow the rule used to create the vector: line x column (or column x line)