Assignment#2- Marking guide CSI2131 Winter 2001

Question 1: (by Yong)

(1) Mistakes in Huffman tree: -3    
(2) Mistakes in Decoded Message: -3
(3) Mistakes in Encoded Message: -3
(4) Mistakes in total # of bits (224): -3
    Calulate Average bits using 224/6: -2
    Mistakes in Average (2.24): -1

Question 2: (by Yong)

(1) Mistakes in Parsing: -3
    Mistakes in Tree: -2
    Mistakes in dealing with the last index: -1
(2) Mistakes in Original Message Bits (208): -1
    Mistakes in Encoded Message Bits (129): -3
    Forget to calculate the last index in Encoded Message: -1
(3) Considering only last character of previous index's string: -4

Question 3: (by Yong)

"&" outputed: -2
No Comments: -2
Only a Few Comments: -1
Code lack efficiency: -2

Question 4: (by Jeff)

Discounts applied:
-4 Never find the student
-4 never accepts the old password
-4 infinite loop
-4 error during execution
-1 Files or printouts missing
-2 No printouts
-3 Comments missing (few comments)
-3 does not compile
-4 does not run
-3 does not read student correctly
-2 BSearch wrong execution
-3 positioning problem
-3 does not verify the old password
-1 do not confirm the new password
-4 no password update

+2 correct password update