Here is a sample code When I compile this code, although it compiles correctly, xCode gives me a message at the start of the executable file "warning: this program uses gets(), which is unsafe.". Why? Although I can run the program flawlessly, that warning bothers me, because don't know if this command will cause problems when I try to write other programs. Oh, and how can I create a box that contains code in this forums? (you know, just like the box of a quote, but with code).