DaniWeb Forum Index > Software Development > C++

C++ RSS

Getting Key Input

Please support our C++ advertiser: Intel Parallel Studio Home

•

Join Date: Aug 2005

Posts: 29

Reputation: vartotojas is an unknown quantity at this point

Solved Threads: 0

vartotojas vartotojas is offline

Offline

Light Poster

Getting Key Input

Sep 27th, 2005

I know how to use C++ to recieve input via

Help with Code Tags

C++ Syntax (Toggle Plain Text)

cin >> x;

But now I want a way to constantly check for input without pressing enter.

To my knowledge with cin you must press enter to assign whatever they typed to a variable.

How could I make it so that when the left arrow key is pressed it adjusts a variable (No need to press enter.)

Thank you! (This is console mode)

As an example of what I want to do...When someone pushes down it would add 1 to row_number. If they push up I want it to subtract from row_number.

Same thing with row_column...

As a note all I want is a tutorial or the code to catch the key...Thanks again!

•

Join Date: Sep 2004

Posts: 7,603

Reputation: Narue has a reputation beyond repute

Solved Threads: 713

Narue

Offline

Code Goddess

Re: Getting Key Input

Sep 27th, 2005

>To my knowledge with cin you must press enter to assign whatever they typed to a variable.
Correct. Input in standard C++ is line oriented, so to read raw input you need to use a system-dependent or compiler-dependent solution. This is offers three such solutions, but since you didn't tell us what compiler and operating system you're using, I can't help you any better than that.

I'm here to prove you wrong.

•

Join Date: Aug 2005

Posts: 29

Reputation: vartotojas is an unknown quantity at this point

Solved Threads: 0

vartotojas vartotojas is offline

Offline

Light Poster

Re: Getting Key Input

Sep 27th, 2005

•

Originally Posted by Narue

>To my knowledge with cin you must press enter to assign whatever they typed to a variable.
Correct. Input in standard C++ is line oriented, so to read raw input you need to use a system-dependent or compiler-dependent solution. This is offers three such solutions, but since you didn't tell us what compiler and operating system you're using, I can't help you any better than that.

Thank You! I am currently using Dev-CPP.

Here is my code

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
    cout << "Please configure the keys!\nTap Left Now";
        int left = getch();
    cout << "Tap Right Now\n";
        int right = getch();
    cout << "Tap Up Now\n";
        int up = getch();
    cout << "Tap Down Now\n";
        int down = getch();
    cout << "Please configure the keys!\nTap Left Now";
        int left = getch();
    cout << "Tap Right Now\n";
        int right = getch();
    cout << "Tap Up Now\n";
        int up = getch();
    cout << "Tap Down Now\n";
        int down = getch();

It works nicely except when I push Left it will assign right the same value. How would I stop that? With cin I could do cin.ignore...Is it something similar with this? Thanks!