Why does dividing a float by an integer return 0.0?

Question

So if I have a range of numbers \'0 - 1024\' and I want to bring them into \'0 - 255\', the maths would dictate to divide the input by the maximum the input will be (1024 in

Answer 1

It's because you're doing integer division.

Divide by a double or a float, and it will work:

double scale = ( n / 1024.0 ) * 255 ;

Or, if you want it as a float,

float scale = ( n / 1024.0f ) * 255 ;