Jump to content
  • Advertisement

Archived

This topic is now archived and is closed to further replies.

alex997

Quick C++ question

This topic is 5336 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

How can I test the keyboard for a keypress? I don''t want to have to wait for the user to enter something, just see if a key is being held down. I''m writing a console app, so no windows message queue available. Basically I am in a loop, I wait to see if a file exists, if so I act on it. I wanna test the keyboard to see if I need to quit. If no key press I wait a while then start the main loop again:
Loop {
  if (file exists)
      act on it
  wait 2 seconds
  if (key pressed)
     close down ports and dynamic classes/arrays then quit nicely
}
 

Share this post


Link to post
Share on other sites
Advertisement
1) #include <conio.h>

2) kbhit();

3) getch();

so for example:


#include <conio.h>

int main() {

int myChar = 0;
while(myChar != 27) { // while ESC was not pressed


//

// do something continuousely here

//


if(kbhit()) myChar = getch();
};
};


The only problem with this is that it''s 100% CPU usage

Share this post


Link to post
Share on other sites
That''s great, cheers.

The cpu usage is fine, I just check kbhit once at the end of the loop which contains a Sleep(2000) anyway.

Share this post


Link to post
Share on other sites
Not if there's a Sleep(2000) (or a sleep(2)) in there somewhere.

[edit: too slow! I blame the nachos.]

[edited by - fractoid on March 5, 2004 11:11:55 AM]

Share this post


Link to post
Share on other sites

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!