The following is the grading policy for assignment 10:

(1)20% The program is error-free for the compilation

(2)60% The correctness of the program
     
      1). 15%---that each of the six symbols appear in each 
             of three position with approximate probability
            i.e. each with p around 1/6 accordint to proper
            useing rand() srand() methods.
      2). 40%--- that see if the program work correct among
             the following 8 situations(each takes 5% apart)

             ps: the position is fiexd 
                   1      2       3            gains
               a. BAR    BAR     BAR            $250
               b. BELL   BELL    BELL/BAR       $20
               c. PLUM   PLUM    PLUM/BAR       $14
               d. ORANGE ORANGE  ORANGE/BAR     $10
               e. CHERRY CHERRY  CHERRY         $7
               f. CHERRY CHERRY    -            $5
               g. CHERRY    -      -            $2
               h.     other unlistd cases       $0

             caution: every time you have to pay $1 to play
                      the game with initial owing $50 .

        3).5% ---the game is over with: 
            (a).press no to quit ( 4% )
   
(3) 10% comments:
    2% Basic information
    2% problem description and I/O description.
    3% function description
    3% test description

(4) 10% style:
    2% file_name (If xxxxxxxxx_10.c, xxxxxxxxx is student's id number)
    3% is I/O interface friendly?
    2% variable-name
    3% indentation