title: functions sound/delay/nosound in dos.h for c/c++
body: <p>How can I get a version of language C/C++(downloaded??) where the functions sound, nosound, delay are present in the library DOS.H? 
  For example it doesn't exist in the version c/c++ on code::blocks. What have I to do in order to use/find the functions sound/nosound/delay?
  thank you for your help !</p>