AVR-Chat

Bryan Martin wrote:
> I am attempting to move to C (winavr) from bascom for programming but 
> getting hung up on some fundamentals.
> 
> Given the following
> 
> unsigned char byte_in = 0xA;
> 
> I need to print the decimal value to UART so I want to see 10.  Similar to 
> printf("%d", byte_in).  Lord I hope this makes sense.

static void
format(int num, char digits[6], char *width)
{
     char ndx = 0;
     if(num < 0) {
         digits[ndx++] = '-';
         num = -num;
     }
     else {
         digits[ndx++] = ' ';
     }
     int d = 10000;
     for(int i = 1; i < 6; i++) {
         char n = num/d;
         digits[ndx] = n + '0';
         if(n) ndx++;
         num %= d;
         d /= 10;
     }
     *width = ndx;
}

int
main(int argc, char **argv)
{
     char digits[6], width;

     format(-672, digits, &width);

     for(int i = 0; i < width; i++) {
	putchar(digits[i]);
     }
     putchar('\n');
}