infinite array in c++

i need help making an infinite two dimensional array in c++, in other words, i have no clue how to do it....

can anyone help?

The problem isn't 1D versus 2D. The problem is that vectors suck at sparse arrays, which is what you'll be using if you're trying to make a fake infinite array.

Also, vectors use ints for their index. If you can't go beyond 2^32 or 2^64 elements, that's not infinite now, is it?