eclipse CDT don`t debug my c++ programs

[woxuxow]

I`ve installed eclipse from ubuntu repositories and i installed CDT from "install new software" but anytime i tried to debug a simple program i got an error that says 'launching q.cpp debug' encountered a problem "Program file does not exist"

also there is nothing in run > debug as > what should i do .
when i type commands, eclipse command corrector (i dont know what it is called) don`t show me any command to help to choose the correct command

[woxuxow]

I still don`t know how to fix it.
If anybody know how to fix it please give me some directions.

[xachu4u]

press
ctrl+B

then try debugging or running

[woxuxow]

press
ctrl+B

then try debugging or running

I did but noThing happed