how to invoke code completion window?

[hongxing]

int main()
{
    prin    // <----------I pressed Ctrl+J, not code completion window poped, why?
  

thanks!

[Urxae]

Did you put the right includes at the top?

Code

#include <stdio.h>

Oh, and don't forget to put the default compiler #include paths in your settings -> compiler options -> directories -> compiler (or something like that, don't have C::B handy at the moment)

EDIT: Oh, and indeed you need to press Ctrl+Space, not Ctrl+J. Thanks Squizzz, I missed that. :oops:

[squizzz]

int main()
{
    prin    // <----------I pressed Ctrl+J, not code completion window poped, why?
 

This happened, because Ctrl+J doesn't invoke Code Completion (Ctrl + Space does).
Ctrl+J stands for Auto-completion feature, which is somewhat different than Code Completion. Check Settings->Editor->Auto-complete for more details. (it's also where you can define your own keywords, like prin for example)

[hongxing]

you are right, press ctrl+space to invoke.

but is only shows the functions in my project, when I press "prin" and then ctrl+space, not prntf related function showed.

I have add /usr/include to then path->compiler, whay?

another question, when the code completion showed, how to close it only use keyboard? now I can only close it using mouse click.