RE: [avr-gcc-list] sprintf - formated output as XXX.XXX.XXX

[Dave Hansen]

From: honschu <address@hidden>
[...]
> sprintf( lcd_str1, "HSync %lu", value );
> lcd_puts( lcd_str1 );
>
> the LCD prints out something like: "HSync 80000000"
> but because of the big values, I would love to get a more readable format
> output as "HSync 80.000.000".
>
> Can anyone please help me?

I don't believe there is a standard way to do this.  The following is 
untested and not an extremely clever method, but should come close to 
working:

  char const start_fmt[] = "%3lu";
  char const cont_fmt[] = ",%03lu";
  char cont = 0;
  unsigned long temp;
  unsigned long div;

  for (div = 1000000000; div > 0; div/=1000)
  {
     temp = value/div;
     if (cont)
     {
        printf(cont_fmt, temp);
     }
     else if (temp)
     {
        printf(start_fmt, temp);
        cont = 1;
     }
     value -= temp*div;
  }

HTH,
  -=Dave