quit on return. [*resolved*]

[john tindell]

hey im trying to make a program that loops though numbers until you hit return, im doing on a console program and im not using cin. Does any one know how this can be done?

Thanks

[john tindell]

#include <windows.h>

....
for(;;){
if(GetAsyncKeyState(VK_RETURN))
		break;
	}

...

[Yonatan]

Ack... 100% CPU usage.

[CornedBee]

Why are you writing a console program and not using i/o functions/objects?

[VBGOD]

Damn..

[john tindell]

i just wanted to know how to stop a loop when someone presses a key.

[CornedBee]

Given that you have a message loop:

while(g_bRun) {
  // ...
}

// WndProc:
case WM_KEYDOWN:
  g_bRun = false;
  break;

Of course this only works if the loop is in a different thread.

For console apps, this works for me:

while(GetAsyncKeyState(VK_RETURN) == 0) {
	cout << '.';
	Sleep(100);
}
cout << "\nDone." << endl;

but it is absolutly not what a console app is intended for.