Issue with scanf and char

Hi,

So I get this simple thing here, meant to get a number between 1 and 12. The problem is, in my program, if I enter a character, I get an infinite loop and I just can't find a way to fix it. Any idea?

Code:

---

int demanderposition1()
{
        int position1=1;
       
        do
        {       
                if(position1<=0 || position1>12)
                {
                        printf("Erreur de saisie, veuillez recommencer.\n");
                }
                printf("Faites votre 1er choix de position entre 1 et 12 :");
                fflush(stdin);
                scanf("%d", &position1);
        }while((position1<=0 || position1>12));


        return position1;
}

---

If you don't know that the input that comes in is going to agree with the pattern (in this case, if they are using a keyboard that has anything other than 0-9 on it), then scanf is not an appropriate choice. To get a line of input for further processing, use fgets with a character buffer. You can then attempt to read with sscanf, or if they typed in garbage, throw it away and try again.

And what if I know it's a keyboard with numbers from 0 to 9? :P

If you know that they're using a keyboard with only the 0123456789, then you don't have to worry about them pressing 'b'.

Well sorry, I meant a full keyboard that included too 0 to 9 ^^'

Then scanf is not an appropriate choice. Use fgets to read into a character buffer, and check the input to see if it's a number (using sscanf or strtol).

http://faq.cprogramming.com/cgi-bin/...&id=1043284351