text: what does these lines in c mean? i'm currently learning c... and i don't have the idea why my instructor gave me this code...  #include  #include  main() { printf("hello world"); getch(); }  can someone help me with this? to explain how each line works and why there are brackets and semi-colons found withing the code... also...why in line 3, there is "main()". and what is the use of "getch()" & "printf()"?  please...i badly need your help... i think you need to pick up a book and start studying. this is the most basic of programs, and if you cant understand this, then its time to decide on another career path. im not trying to be mean or anything, just pointing out the reality.