A F#   fuc u,  c  c   f  f    f  fuc   fuc f          fuc  b  u:


   , b =  S..[1],  S..[2]
  f , f  ["+", ( + ) "-", ( - ) "*", ( * ) "", (  ) "%", ( % )] 
    f "% % % = %\"   b (f  b)

F ,  uu   u 4  3 :

4 + 3 = 7
4 - 3 = 1
4 * 3 = 12
4  3 = 1
4 % 3 = 1