Assignment#3 - CSI2131-Winter 2001


WRITTEN PART - QUESTION # 1

question 1:

question 2:
-2: didn’t divide by the number of runs
-3: answer of 100:
(500,000/100) = 5000
              (500,000/5000)  = 100
-4: 1 run of 5000 records

question 3a:

question 3b:
-3: multiplied answer by 5

question 3c:
-2: used 80 instead of 100

question 3d:
-2: divided by the number of output buffers


PROGRAMMING PART - QUESTION # 2

Running Tests:
0/5 for test 1: missing records, not sorted properly, statistics incorrect & 
funny output
-1: extra 4 blank records
-2: repeated records
-2: missing records
-2: not sorted properly
-2: too many records, funny output (student records span more than a line)
0/5 for test 2: tests eof by checking to see if already read in 100 records 
from that file
-3: output more records than read in (ie. still outputs 400 records, when 
some are deleted from one of the       input files)
-4: test caused computer to crash, (or run infinitely)

buffer manipulation I/O:
-5: always reads in 10 at a time from the files
-5: buffer writes to the file everytime, doesn't wait until it's full

cosequential processing:
-3: doesn't initially fill buffer
-3: doesn't find minimum student correctly
-2: doesn't flush at the end

Standards:
-2: missing files
-1: missing part of printouts
-3: missing over half of the required printouts or more
-1: wrong file names
-2: extra files

Style problems:
-5: no comments
-3: merging done in main program
-2:  didn't use general constants for buffer size
-2:  didn't use general constants/variable for number of files to merge

-6: cosequential processing is fixed for 4 files
   (here I mean the comparisons are done between 4 files
    to find the minimum, rather than a loop to find the minimum in
    array)

student manipulation & statistics manipulation:
-1: for outputting student records different from the way they were inputted
      (ie.    2053 3 76 instead of 000205303076 )
-3: for errors in statistics (wrong numbers, not written out)
-5: for not implementing methods to take care of statistics