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Friends i m doing a program in which user enters as many numbers as he want
until he press ESC key.
Do you know any function like kbhit() to get know whether ESC is pressed or
not. plz help me.
Also hint me if there is another way to do this program.
thanks in adavance.
There are ways of doing what you ask, but they may be beyond the difficulty of what you need.
Take for example, the user is entering numbers:
125 <enter>
7934 <enter>
81 <enter>
Now the user is done entering numbers and wants to quit. What would be more natural than:
ESC or q <enter> /* ESC or q to quit */
?
That's what I do for my (hobby) programs these days.
> 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.
i.e., it returns true if there's a keypress waiting in the input buffer.Quote:
Do you know any function like kbhit() to get know whether ESC is pressed or not.
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.
Something like that.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 */
}