Thread: How to trap ESC key pressed without getch()?

> What would be more natural
Actually I think what he wants makes some sense. q has an underlying integer value of it's own after all. As does ESC, but ESC can be easier to recognize since it is a functional key.

The OP should read the parts about text in our FAQ. There's a section in there that explains why/how to use GetAsyncKey() from the Win32 API for this. kbhit() isn't the right function for this though: it doesn't capture any input.

kbhit() does do this, however.

Do you know any function like kbhit() to get know whether ESC is pressed or not.

i.e., it returns true if there's a keypress waiting in the input buffer.

For the most sense, I suggest using EOF to indicate the end of the numbers. Assuming that you don't get any other user input afterwards. EOF can be typed from the keyboard with CTRL-Z on windows and CTRL-D on Linux. You detect for it by checking the return value of getchar() or some other line-buffered single character input function against EOF, or the return value of scanf(), among other ways.

Actually, what I would suggest is using scanf(): that way, the user can type ESCAPE or CTRL-Z or "q" or any invalid number to stop entering numbers.

Code:

int x, rv, c;

while((rv = scanf("%d", &x)) == 1) {
    printf("Processing %d\n", x);
}

if(rv != EOF) {
    while((c = getchar()) != EOF && c != '\n');  /* strip excess characters from stdin */
}

Something like that.