kbhit() for enter key? not working

This is a discussion on kbhit() for enter key? not working within the C++ Programming forums, part of the General Programming Boards category; I'm trying to make a loop to build a string while the program is running. When the enter key is ...

  1. #1
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    kbhit() for enter key? not working

    I'm trying to make a loop to build a string while the program is running. When the enter key is hit I want to process the string. Basically I want gets() without blocking. So I'm trying to use kbhit() to do this.

    PHP Code:
                if (kbhit())
                    {
                        
    str[stri] = getch();
                        
    cout << str[stri];

                        if (
    str[stri] == '\n')
                        {
                            
    //rakClientInterface->RPC("PrintMessage", str, (strlen(str)+1)*8, HIGH_PRIORITY, RELIABLE, 0, false);

                            
    system("PAUSE");

                            
    stri 0;
                            
    str[0] = '\0';
                        }
                        else
                        {
                            
    stri++;
                        }
                    } 

  2. #2
    BMJ
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    Banal internet user BMJ's Avatar
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    Is this a win32 console program? Because if it is, don't try to use kbhit().

    Here's an alternative:
    Code:
    // Waits for keypress event and returns that key (virtual-key code)
    WORD GetKeypress()
    {
    	HANDLE hStdIn = GetStdHandle(STD_INPUT_HANDLE);
    	INPUT_RECORD irEvent;
    	DWORD dwNumEventsRead;
    	WORD wReturn;
    
    	for (;;)
    	{
    		WaitForSingleObject(hStdIn, INFINITE);
    		PeekConsoleInput(hStdIn, &irEvent, 1, &dwNumEventsRead);
    		if ((irEvent.EventType == KEY_EVENT) && (irEvent.Event.KeyEvent.bKeyDown))
    		{
    			ReadConsoleInput(hStdIn, &irEvent, 1, &dwNumEventsRead);
    			wReturn = irEvent.Event.KeyEvent.wVirtualKeyCode;
    			FlushConsoleInputBuffer(hStdIn);
    			return wReturn;
    		}
    		else
    			ReadConsoleInput(hStdIn, &irEvent, 1, &dwNumEventsRead);
    	}
    }
    And if you're not implementing a Windows console program, then sorry.
    Last edited by BMJ; 04-02-2006 at 04:17 PM.

  3. #3
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    Its a console aplication, not a win32. I commented the raknet function and put in system("PAUSE") just to see if it was working, but its not executing system("PAUSE") I don't think. Its not outputing Press any key to continue . . . and when I hit enter it doesn't terminate the program.

    Can anyone tell me what I've done wrong and a solution to fix it?

    If not can anyone tell me a good place to learn windows threads?

  4. #4
    Been here, done that.
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    Try outputting str[stri] in hex as you read it with getch(). You'll probably find, as I did, you are checking for the wrong character in your IF.
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    Which compiler are you using?
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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