CS1101C Practical Exam

Question 2 (xxxx - xxxx hours)

Test Mark Processing

The name of your C program file must be called testpro.c, files with any other name will not be marked.

The deadline for this lab is Wednesday 12 November 2008, xx:xx:xx hours. Strictly no submissions will be accepted after the deadline.

After scanning in student OCR forms, data is obtained in a “raw” format. Each line represents a student's matriculation number and his/her answers. We need to process this data and automatically mark each student's OCR form and present it in a human readable format.

Text File

Assume that the text file is always called “raw1.txt” and that this file always exists. (It has been copied into your directory by the “pesetup” command.) Let us look at the file's contents:

               53453214544141342235241214
NT081234X 0000 53413214554313345235141211
NT085703H 0000 53433214544135345235241214
U080001A  0000 53433514114124311215245221
U080002B  0000 55142514125335252535211224
U080003E  0000 54433224135341351534241524
U080005H  0000 53145524245111424324415224
U080007J  0000 43133524544111342235245114
U080009L  0000 55432214525531422235241111
U080010M  0000 33333314524441342534145113
U080011N  0000 35232434355553432333432124
U080012R  0000 53553212121543231235141214
U080014U  0000 53122144215123351133235224
U080016W  0000 55214222531433341224443142
U080017X  0000 45433114425313321233111353
U080018Y  0000 53423411525141352233242254
U080020Y  0000 15443344445321342235241213
U080021X  0000 53545344155341355514232314
U080023B  0000 53453214544141342235241214
U080025W  0000 45433514135141342211111514
U080028U  0000 55115543125535345545445134
U080030R  0000 55433214525121342535241214
U080033N  0000 51135542113515331513225314
The first line in the text file consists of zero or more blank spaces followed by the answer key (also known as the correct answers to the test). So, the correct answer to question one is 5 (which means E), the correct answer to question 2 is 3 (which means C), and so on. You may assume that there are 26 questions in the test.

Subsequent lines consists of the student's matriculation number (which has at most nine characters), followed by one or more blank spaces, followed by four zeroes (ignore this data), followed by one or more blank spaces, and finally followed by the student's answers to the questions. You may assume that students will attempt every question.

Note that the number of lines in the text file is not known. You are to read the file until you reach the end of the text file.

Your task is to read in the answer key and all answers for all students, then mark each student's answers. Students get 1 mark for each correct answer, 0 marks otherwise. Print out the processed data on the screen in the following nice format, in the same order as the text file.

Take note of the following.

  1. The first column consists of the student's matriculation number.
  2. The second column consists of the student's mark.
  3. Student's answers then follow; note that after every fifth answer, we have a vertical bar as a separator. If the student's answer is correct, we show it as an upper-case letter; if it is incorrect, we show it as a lower-case letter.
  4. The first and last rows of the output complete the table. 

+-----------+----+-----------+-----------+-----------+-----------+-----------+---+
| NT081234X | 18 | E C D a C | B A D E e | D c a c C | D e B C E | a D A B A | a |
| NT085703H | 22 | E C D c C | B A D E D | D A c e C | D e B C E | B D A B A | D |
| U080001A  | 14 | E C D c C | e A D a a | D A b d C | a a B a E | B D e B b | a |
| U080002B  | 10 | E e a d b | e A D a b | e c c e b | e B e C E | B a A B b | D |
| U080003E  | 13 | E d D c C | B b D a c | e c D A C | e a e C d | B D A e b | D |
| U080005H  |  8 | E C a d e | e b D b D | e A a A d | b d c b d | d a e B b | D |
| U080007J  | 18 | d C a c C | e b D E D | D A a A C | D B B C E | B D e a A | D |
| U080009L  | 15 | E e D c b | B A D E b | e e c A d | b B B C E | B D A a A | a |
| U080010M  | 14 | c C c c C | c A D E b | D d D A C | D B e C d | a D e a A | c |
| U080011N  |  4 | c e b c b | d c D c e | e e e c d | c B c C c | d c b a b | D |
| U080012R  | 15 | E C e E C | B A b a b | a e D c b | c a B C E | a D A B A | D |
| U080014U  |  9 | E C a b b | a d D b a | e A b c C | e a a C c | B c e B b | D |
| U080016W  |  7 | E e b a d | B b b E c | a d c c C | D a B b d | d D c a d | b |
| U080017X  |  8 | d e D c C | a A D d b | e c a c C | b a B C c | a a A c e | c |
| U080018Y  | 17 | E C D b C | d A a E b | e A D A C | e B B C c | B D b B e | D |
| U080020Y  | 16 | a e D d C | c d D d D | e c b A C | D B B C E | B D A B A | c |
| U080021X  |  9 | E C e d e | c d D a e | e c D A C | e e e a d | B c b c A | D |
| U080023B  | 26 | E C D E C | B A D E D | D A D A C | D B B C E | B D A B A | D |
| U080025W  | 14 | d e D c C | e A D a c | e A D A C | D B B a a | a a A e A | D |
| U080028U  |  6 | E e a a e | e d c a b | e e c e C | D e e d E | d D e a c | D |
| U080030R  | 20 | E e D c C | B A D E b | e A b A C | D B e C E | B D A B A | D |
| U080033N  |  5 | E a a c e | e d b a a | c e a e C | c a e a c | B b e c A | D |
+-----------+----+-----------+-----------+-----------+-----------+-----------+---+

Important Notes

Do not use any structures or any form of dynamic memory allocation (using malloc or calloc) in your program, else no credit will be given.

Remember to submit your program frequently using the submit testpro.c command, and check your submission using the check command.

All the best!

UNIX commands

Some useful UNIX commands (in case you forgot what you did in Lab 0):

  1. “dir”: lists all the files in the directory.
  2. “cp a.txt b.txt”: copies a.txt to b.txt.
  3. “mv a.txt b.txt”: moves / renames a.txt to b.txt.
  4. “cat a.txt”: shows the contents of a.txt.