function [queue,length,bottom] = Add(queue,q,e,alpha,beta,length,bottom)
%  Add an entry to the end of the queue.

[maxq,cols] = size(queue);
queue(bottom,1) = q;
queue(bottom,2) = e;
queue(bottom,3) = alpha;
queue(bottom,4) = beta;
length = length + 1;
if bottom < maxq 
  bottom = bottom + 1;
else  
  bottom = 1;
end