%%%%%%%%%%%%%%%%%%%%%%%%%%%%  Number to String  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% INTTOSTR
% Usage: INTOSTR(n)
%
% Inputs:  n - a positive integer 
%   
% Output:  string form of n

function str = intostr(n) 
    str = [];
    sign = [];
    if (n < 0) sign = ['-']; end;
    if (n == 0) sign = ['0']; end;
    n = abs(n);
    while (n > 0)
          d = rem(n,10);
          str = [setstr(abs('0')+d) str];
          n = (n-d)/10;
          end;
    str = [sign str];