Question

i seen to be having a problem with the line:

int xPos = ((x / maxX) * X_AXIS_LENGTH) + X_AXIS_OFFSET; =

for testing purposes i have assigned:

int x = 10;
int maxX = 52;

but when used in this calculation x / maxX gives me 0 instead of 0.19!

http://s12.postimage.org/uawn8b6l9/image.png

Answer 1

You’re doing integer division here:

x / maxX

Integer division will truncate the fractional part.

Cast one of the parameters to floating-point to fix it:

(double)x / maxX

You might also want to store the whole thing into a double instead of int:

double xPos = (((double)x / maxX) * X_AXIS_LENGTH) + X_AXIS_OFFSET;