Comparing two integers without any comparison

Question

Is it possible to find the greatest of two integers without any comparison? I found some solutions:

if(!(a/b)) // if a is less than b then division result          


        

Answer 1

(!(a/b) ?  cout << " b is greater than a" : (!(b-a) ? cout << "a and b are equal" :  cout << "a is greater than b") :  cout << "a is greater than b");

That gets a bit messy though

Edit: Is this homework?