Continuous input

[Hucaru]

Hi, I am trying to make a calculator and was wondering if there was a way to evaluate input before submitting it? For example

char = ch;

while (cin >> ch)
{
    if (ch == 'q')
       break;
    else
      stream.pushback(q);
}

The above does not work as it waits for me to finish input with an enter and then checks for q. Is there a way to check for q with every key press?

[cnoeval]

This type of thing is a PITA (Pain In The Ascii) to do in the console. You can find ways to directly poll the input stream with external libraries but I suggest you start learning GUI libraries instead. With a GUI you have simple event handling that would allow you to respond when a uses types a character into a text box for instance.

EDIT: If you REALLY need to do this in a console program check into conio and curses (pcurses and ncurses are later versions). They offer functions that will help... at least in Windows.

[Hucaru]

Cheers, thanks.