Problem about reading an int, but allow ESC to be pressed

[Gustaff]

Hi There.

I'm making a routine in C that reads a simple int. I want this routine to allow ESC key, so when the user changes his/her mind about continuing entering digits, he or she can press ESC to exit this routine.

I have been searching in this site all the way around, and seems that there's no way Hard to beleive! I have studied getch(), getc() getchar(), etc.. as well as kbhit(), nothing seems to work. does anyone of you genious have any idea?

Here's what I have so far:

int ReadNumber( int *number) {

/* modifies it's argument depending on what number the user types, if the user change his/her mind he/she can press ESC and the function returns 1 if so, otherwise, it returns 0 */

{
char c,digit;
char strnumber[10];
int i=0;


printf("Enter your number (ESC to quit) :");

do {

c = (char) getch();
if ( is_a_digit(c, *digit) ) {
strnumber[i++] = digit;
}
else { c = int(c);
switch(c) {
case 8 : /* backspace bla bla */
break;
.
.
.
} /* switch */
} /* else */

} while (c !=27);

strnumber[i] = '/0' /* sorry couldn't find the backslash in this machine */
*number = atoi(strnumber);
return(0);
}


int is_a_digit (char c, char *dig) {

/* assume this returns 1 if c is a digit, and if so puts it in *dig, otherwise return 0 . Could you do that for me, thanks */

}


I run it but when the user types ESC, I have a little arrow on the screen (pointing to the left).
Is there any other way to catch digit by digit to analyse them?
I'm working with Dev-C++, windows 98, pentium processor.

Thanks in advance.

Gustaff.

[Shadow]

else { c = int(c);
switch(c) {
case 8 : /* backspace bla bla */
break;
.
.
.
} /* switch */
} /* else */

} while (c !=27);

strnumber[i] = '/0' /* sorry couldn't find the backslash in this machine */
*number = atoi(strnumber);
return(0);
}

Perhaps someone can add onto my reply, but I believe I had this problem at once.

Insinde of a switch / case statement, it would be:

char AcceptCharacter; //Whatever name you want to use
AcceptCharacter=getch();
switch(AcceptCharacter)
{
    case 27:
    //Do code for when the user presses escape

    default:
    //Your default case

    case '1':
    case 'b':
    // case etc,
    //Your other cases
}

BTW, what is this code for?

I see some switch and case statements in there. I'm making a program that is switch and case statement heavy. It has ALOT of goto's inside of it. I'm thinking of re-doing bits and pieces of the code. Ya know? Analyze, test, change, & retest something until it's as good as you can make it before continuing.

Menu
Albeit simple, take a look at "Menu". It's a personal program of mine I'm making.