1 Class motto: What’s this button for?

2 CMSC104 Problem Solving and Computer Programming Section 4, Spring 2012 Prof. Richard Chang

3 Contact Information Office hours: ITE 326 Tues & Thurs: 2:00 – 3:00pm

4 Am I in the Right Class? CMSC 104 Assumes NO programming experience Prepares you for CMSC 201 Does NOT count towards the CS major Meets a requirement for other majors: i.e. Biology, Physics, Financial Economics CMSC 201 Assumes some programming experience First CMSC course for CS majors More challenging

CMSC100 vs CMSC104 CMSC100: less technical, less programming, more overview of computer science. CMSC104: concentrates on programming, you have to learn programming to pass this class. 5

6 This is an ELECTIVE class Main Objective: Learn Programming in C Strategy: Classwork ⇒ Homework 1 ⇒ Homework 2 ⇒ Quiz ⇒ Final

7 Command Line Interface Basic use of an operating system (Linux) a text editor

8 Levels of Programming typing: copy a program verbatim coding: convert high-level solution (pseudo-code?) into syntactically correct program design: producing a high-level solution to original problem debugging: oops!

9 Debugging bugs: mistakes in your program debugging: removing bugs Almost no one writes bug-free programs on the first attempt Programming is mostly recovering from a series of bugs Be resilient!

10 Course Web Page Location: Announcements Course Syllabus Homework Assignments Powerpoint? I hate Powerpoint

11 Why do I hate Powerpoint? The next slide never has what I want to say.

12 Why do I hate Powerpoint? Besides, I’m not going to just stand up here and read the slides to you verbatim.

13 Grading 14 Classwork: 14%, 1% each 13 Homework: 26%, 2% each 5 Quizzes: 30%, 6% each 1 Final Exam: 30%

14 No Late Homework Assigned on Tuesday Due next Tuesday, 11:59pm 2 class meetings to ask questions

15 How hard is the homework? 10 minutes for C programmer min for “good” student ??? for “less good” student

16 Classwork Must be done in class Can “finish up” by next class for 10% improvement Miss class ⇒ miss classwork

17 Extra Credit Must be “mostly” correct Can only replace classwork and homework scores 110% HW+CW & 80% Quiz+Final = 100% x % x 60 = = 88 = B not = 110% x % x 60 = = 92 = A

18 Do No Classwork? Classwork0% x 14 = 0 Homework100% x 26 = 26 Quizzes100% x 30 = 30 Final Exam100% x 30 = 30 Total = 86= B

19 “Outsource” Homework? Classwork100% x 14 = 14 Homework100% x 26 = 26 Quizzes50% x 30 = 15 Final Exam50% x 30 = 15 Total = 70= C

20 Fall 2011 Grade Distribution 8 A’s 8 B’s 9 C’s 2 D’s 7 F’s (includes 3 final exam no shows)

21 Academic Integrity Do your own work = nice, hard-working, diligent student Do no work = lazy / over-committed / forgetful student Cheat = pond scum

22 Allowed Help from Help Center & instructor Help from other sources (incl. classmates) Discuss assignment Identify syntax errors Identify simple logic errors

23 Not Allowed (not exhaustive) Someone else typing code in your program Cut & paste more than 1 line of code Looking at someone else’s program while typing in your code Receive someone else’s program by , text message, hard copy, … Send program to another student …

24 General Philosophy This policy recognizes that students can learn productively from many sources including from other students in the class. Thus, this policy allows small amounts of help but prohibits outright copying. Although, this leaves a gray area between "small amounts of help" and "outright copying", it is better that we live with some ambiguity than to have a clear-cut policy that deprives the students of productive learning opportunities. Students who have doubts about the propriety of an activity should consult the instructor.

25 Academic Integrity Do your own work = nice, hard-working, diligent student Do no work = lazy / over-committed / forgetful student Cheat = pond scum

26 Scenario #1 Classmate: “My program won’t compile. It says ‘missing semi-colon’ !”

27 Scenario #1 Classmate: “My program won’t compile! It says ‘missing semi-colon’ !” OK to help point out location of missing semi-colon. (Yes, you can look at his/her program to find it.)

28 Scenario #2 Classmate: “Why won’t this print statement execute??? !”

29 Scenario #2 Classmate: “Why won’t this print statement execute??? !” OK to look at his/her program to help find logic error. NOT OK to tell him/her how to rewrite the program.

30 Scenario #3 Classmate: “I don’t know how to get started on this homework. Can I see what you did?”

31 Scenario #3 Classmate: “I don’t know how to get started on this homework. Can I see what you did?” NOT OK to show him your program. “Good thing you started the program when it was assigned. Ask Chang in class tomorrow, he’ll give us some hints.”

32 Cheat “legally”?? How can one student show his completed program to another student “legally”?? Still won’t learn much, still pond scum.

33 This is an ELECTIVE class Manage your own learning experience! Remember: Classwork ⇒ Homework 1 ⇒ Homework 2 ⇒ Quiz ⇒ Final

34 “Outsource” Homework? Classwork100% x 14 = 14 Homework100% x 26 = 26 Quizzes50% x 30 = 15 Final Exam50% x 30 = 15 Total = 70= C

35 Scenario #4 It is one hour before homework is due. You can’t get homework finished in time.

36 Scenario #4 It is one hour before homework is due. You can’t get homework finished in time. NOT OK to have your CS major boyfriend/girlfriend/roommate/parent/sibling do it for you in 10 minutes.

37 Scenario #4 It is one hour before homework is due. You can’t get homework finished in time. You won’t die, HW is only 2%. Do as much as you can in one hour and submit it for partial credit. Start on next week’s HW so this won’t happen again. Do extra credit to make up the points.

38 Academic Integrity Do your own work = nice, hard-working, diligent student Do no work = lazy / over-committed / forgetful student = at least he/she didn’t CHEAT! Cheat = pond scum

39 How to make this class harder Skip class Come to class but spend the whole time checking , facebook, shopping,... Come to class late all the time Come to class, don’t ask any questions Ignore the textbook Wait until the last minute to start HW

40 Computer Science at UMBC CSEE Student Services Office (Advising) ITE CSHC (Computer Science Help Center) ITE 201E Linux Users Group (LUG)

41 DoIT Labs The Dept of Information Technology is responsible for all lab computers. On Web at: Labs with PCs: ENG021, ENG104, ENG122, ENG122A, ENG333 Labs may be on reserve for classes, so plan ahead! Print Dispatch -- ENG 019 (10? cents/page) Hours of Operations DoIT will post outside of labs or go to :

42 Consultants vs. Tutors OIT labs are staffed by consultants using software (pine, Internet Explorer, etc.) some text editors (xemacs) operating system commands (Linux) communicating with UMBC computers (TeraTerm)

43 Consultants vs. Tutors (con’t) CSHC is staffed by student tutors Help with homework and projects xemacs and Linux questions ITE 201E – Hours TBA

44 Hardware and Software Needs Do I need my own computer? No, but it is more convenient for you. If I have my own computer, can I use it? Yes, but there’s limited help for using your own. Do I need a C Compiler? Don’t buy one, the GNU C compiler is free.

45 Windows: TeraTerm (from OIT), WinSCP, NotePad++ Mac: Developer Tools (free), Terminal + Unix commands, TextWrangler Linux: Installation is on your own More later... Hardware and Software Needs

46 Class motto: What’s this button for?

47 Getting a myUMBC Account You MUST have a myUMBC account You can get one by going to: (NO Your account can be used in ~½ hour Grades, etc.

Booting into Linux Modify instructions posted on the walls: press CTRL-ALT-DEL select “Restart” from pop-up menu next to the shutdown button on bottom right select “Linux” using arrow key log in using usual password 48

Reduce Firefox Cache Size You have a disk quota of 100MB. Set Firefox cache size to be 5-10MB. 49