suppress leading zero's on lcd

[da21]

Hi all ,
i am trying to suppress leading zero's on a thermometer application using a standard LCD display , i thought this should work but i get a
'constant out of the valid range ' -16 is not 0..255 error
i am sure i have used this on an older version of the compiler before


boolean zero;

if (!num && zero) // blank zero's if previous was zero
{
num = ' ' - '0'; ?? error on this line
}

any idea of a fix

[Ttelmah]

Surely, if you just want to blank the digit, the line wants to just read:

num=' ';

As it stands, you are taking ASCII 'space' (=32), and subtracting ASCII '0' (=48).

If you do want to put '-16' into the num value, you can do it with:

num=(int8)(' '-'0');

It'll actually be stored as '0xF0', which will behave like -16, if arithmetic is performed on it (add 16 to get 0 etc.).

Best Wishes