pointers in C

I have a little problem. way back in high school I took java, and never had to deal with these little things. now, at college, they're making me take C. I don't have anything against it, its just that.. well I'm not entirely sure what pointers are used for, or what they accomplish. would anyone care to elighten me?

>>10

As EXIT_SUCCESS is always defined as 0, it doesn't make any difference which one you use. Any decent programmer is going to know what "return 0" means from main().