Turn while loop into math equation?

Question

I have two simple while loops in my program that I feel ought to be math equations, but I\'m struggling to convert them:

float a = someValue;
int b = someOtherVa         


        

Answer 1

c = (int)((a - (b / 2)) / b + 1);
a -= c * b;

Test case at http://pastebin.com/m1034e639