snakeGame 참고 document <ncurses.h> document https://web.archive.org/web/20140812204609/https://wiki.kldp.org/wiki.php/NCURSES-Programming-HOWTO#s-1.1.1 https://wiki.ubuntu-kr.org/index.php/Terminal_Programming#.EB.8B.A4.EC.A4.91_.EC.9C.88.EB.8F.84.EC.9A.B0 <time.h> document https://modoocode.com/108