rounding my decimal float to nearest half or whole number?

Question

Ok im having issues with my calculations in my app and im pretty sure that it is due to the decimals being to long. This is something that needs to be done anyway because it

Answer 1

The easiest way is to take your final number, times 2 and round. Then divide by 2.

(abHipAvg = (((ab1+ab2+ab3)/3)+((hip1+hip2+hip3)/3)));
abHipAvg = roundf(abHipAvg * 2.0f) / 2.0f;

and the same with neckAvg.