I started learning c++ not too long ago and even though I understand some of pointers I don't understand what they can do that you can't do without pointers! Is it just because it is more efficient? Writing an example of a program only possible with pointers would be nice, or just explain a program is also fine.
Without pointers, you would be unable to make very big objects or very big arrays, unable to access hardware, and a whole bunch of other things in that thread.
Here's something very simple you'd find awfully hard to do without pointers (probably - I suppose you could have some mutant OS with the world's biggest stack, but you probably have a standard consumer OS like most people); make an array of 10000000 int.