Loop until a key is pressed

[kingneb]

I am using visual studio 2008. I am trying to write a loop that continues until a user presses the y or the n key. I can do it if the user types one or the other of these and presses enter, but I want the loop to exit once Y or N is pressed directly. What I am doing is a yes/no prompt like this.

char keyin;
do
{
        // Listen for keyboard input.  If Y or N is pressed, terminate loop.
}
while (keyin != toupper('y') && keyin != toupper('n');

Thanks

[matsp]

Do you absolutely have to loop "listening" for a key - would calling getchar() and block your CPU usage until the key actually comes in not be a good plan?

--
Mats

[Elysia]

I believe the OP wants a function that blocks until a key is pressed and then returns directly (without having to press enter), similar to the non-standard getch.

[matsp]

I believe the OP wants a function that blocks until a key is pressed and then returns directly (without having to press enter), similar to the non-standard getch.

In which case there are functions described in the FAQ on "how to read user input without enter" or something along those lines.

--
Mats