Learning C through K&R book

I already compiled and ran my first code but there's this thing.
When I run it, cmd flashes and disapears.(I'm using Dev-C++ on windows to make it)
Anyways, I think there was a command or function to make the cmd pause till I press enter or something like that so that I am able to read whatever the output was, the thing is, I cant remember the name of the function or how to write it.
Can one of you tell me which it is, if there is one.
BTW here's my code:


#include <stdio.h>

main ()
{
  printf("Hello World!");
}

I'm a computer science major at San Francisco State University that has to take a semester of set theory. I think this is the departments effort to "enlighten the undergrads."

Now, we just finished the second week, and half the class has is already lost. Why is this?