1 class motto: what’s this button for?. 2 cmsc104 problem solving and computer programming section...
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Class motto:What’s this button for?
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CMSC104
Problem Solving and Computer Programming
Section 4, Spring 2012
Prof. Richard Chang
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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.
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This is an ELECTIVE class
Main Objective:
Learn Programming in C
Strategy:
Classwork Homework 1 ⇒
⇒ Homework 2 Quiz Final ⇒ ⇒
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Command Line Interface
Basic use of an operating system (Linux)
a text editor
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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!
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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!
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Course Web Page
Location: http://umbc.edu/~chang/cs104
Announcements
Course Syllabus
Homework Assignments
Powerpoint? I hate Powerpoint
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Why do I hate Powerpoint?
The next slide
never has
what I want to say.
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Why do I hate Powerpoint?
Besides,
I’m not going to just stand up here
and
read the slides to you verbatim.
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Grading
• 14 Classwork: 14%, 1% each
• 13 Homework: 26%, 2% each
• 5 Quizzes: 30%, 6% each
• 1 Final Exam: 30%
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No Late Homework
• Assigned on Tuesday
• Due next Tuesday, 11:59pm
• 2 class meetings to ask questions
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How hard is the homework?
• 10 minutes for C programmer
• 30-60 min for “good” student
• ??? for “less good” student
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Classwork
• Must be done in class
• Can “finish up” by next class for 10% improvement
• Miss class miss classwork⇒
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Extra Credit
• Must be “mostly” correct
• Can only replace classwork and homework scores
• 110% HW+CW & 80% Quiz+Final = 100% x 40 + 80% x 60 = 40 + 48 = 88 = B
not = 110% x 40 + 80% x 60 = 44 + 48 = 92 = A
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Do No Classwork?
Classwork 0% x 14 = 0
Homework 100% x 26 = 26
Quizzes 100% x 30 = 30
Final Exam 100% x 30 = 30
Total = 86= B
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“Outsource” Homework?
Classwork 100% x 14 = 14
Homework 100% x 26 = 26
Quizzes 50% x 30 = 15
Final Exam 50% x 30 = 15
Total = 70= C
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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)
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Academic Integrity
• Do your own work= nice, hard-working, diligent student
• Do no work= lazy / over-committed / forgetful student
• Cheat= pond scum
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Allowed
• Help from Help Center & instructor
• Help from other sources (incl. classmates)
• Discuss assignment
• Identify syntax errors
• Identify simple logic errors
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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 email, text message, hard copy, …
• Send program to another student …
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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.
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Academic Integrity
• Do your own work= nice, hard-working, diligent student
• Do no work= lazy / over-committed / forgetful student
• Cheat= pond scum
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Scenario #1
Classmate: “My program won’t compile. It says ‘missing semi-colon’ !”
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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.)
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Scenario #2
Classmate: “Why won’t this print statement execute??? #@!#$!# !”
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Scenario #2
Classmate: “Why won’t this print statement execute??? #@!#$!# !”
OK to look at his/her program to help find logic error.
NOT OK to tell him/her how to rewrite the program.
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Scenario #3
Classmate: “I don’t know how to get started on this homework. Can I see what you did?”
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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.”
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Cheat “legally”??
How can one student show his completed program to another student “legally”??
Still won’t learn much, still pond scum.
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This is an ELECTIVE class
Manage your own learning experience!
Remember:
Classwork Homework 1 ⇒
⇒ Homework 2 Quiz Final ⇒ ⇒
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“Outsource” Homework?
Classwork 100% x 14 = 14
Homework 100% x 26 = 26
Quizzes 50% x 30 = 15
Final Exam 50% x 30 = 15
Total = 70= C
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Scenario #4
It is one hour before homework is due.
You can’t get homework finished in time.
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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.
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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.
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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
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How to make this class harder
• Skip class
• Come to class but spend the whole time checking email, 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
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Computer Science at UMBC
CSEE Student Services Office (Advising)
ITE 203 - 206
CSHC (Computer Science Help Center)
ITE 201E
Linux Users Group (LUG)
http://lug.umbc.edu
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DoIT Labs
The Dept of Information Technology is responsible for all lab computers.
On Web at: http://www.umbc.edu/doit 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:https://wiki.umbc.edu/display/doit/Computing+Labs+and+Facilities
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Consultants vs. Tutors
OIT labs are staffed by consultantsusing software (pine, Internet
Explorer, etc.)some text editors (xemacs)operating system commands (Linux)communicating with UMBC
computers (TeraTerm)
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Consultants vs. Tutors (con’t)
CSHC is staffed by student tutors Help with homework and projects xemacs and Linux questions ITE 201E – Hours TBA
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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.
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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
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Class motto:What’s this button for?
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Getting a myUMBC Account
You MUST have a myUMBC account
You can get one by going to:
http://accounts.umbc.edu (NO www.)
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 password48
Reduce Firefox Cache Size
You have a disk quota of 100MB.
Set Firefox cache size to be 5-10MB.
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