COMP 110004 Introduction to Programming http:www.cs.unc.edudorianmcomp110

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COMP 110-004Introduction to Programminghttp//ww
w.cs.unc.edu/dorianm/comp110

• Dorian Miller
• August 22, 2005
• MWF 200-315 pm
• Sitterson 014

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Big Picture

• Introduction to COMP 110
• Course motivation and details
• Overview of the Internet
• With class exercise

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Instructor Contact

• Dorian Miller
• Sitterson Hall 361
• Office hours
• MW 330-430pm
• I expect basic understanding of lecture material
• Contact
• dorianm_at_email.unc.edu
• Please start subject line with comp 110
• TA - TBA

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Questions and Feedbackhttp//www.cs.unc.edu/dori
anm/comp110

• In class questions
• Ask in person
• Post question on course web page
• Anonymous feedback online
• Please keep responses respectful and appropriate

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Summary of Programming

• Programming process of creating software
• Examples of software applications
• Internet email, browser
• Office Applications word processor, spreadsheet
• Games card game, 3D-first person

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Top 10 reasons to take COMP 110

• to take COMP 110

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10. Want to be a Comp Sci major

• Have you had a programming course?
• Talk to me consider COMP 401
• Science majors consider
• COMP 116 learn programming with Matlab
• This course tailored to non-CS majors
• no programming knowledge assumed
• Assume basic computer skills
• web browsing, email, word processor, etc.

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9. Complete a math or other requirement

• We use high school math, algebra

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8. Like solving puzzles, tinkering, learning how
things work

• Writing a program is like puzzle solving
• Create a program to solve a problem
• Solution built from limited commands in
  programming language

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7. Want to become less scared of computers

• Become familiar with technology
• Evaluate what is feasible with software
• Example American Idol
• Feasible Computer collects and tallies audience
  votes
• Not Feasible Computer judges contestants

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6. Use computers in your own field

• Processing data with software
• Calculate results for experiment
• Tailor Microsoft Excel spreadsheet
• Automate repetitive tasks
• Collect 100 peoples contact information

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5. We will learn programming for the web

• We use web programming to teach programming
  fundamentals
• Programming languages
• Javascript
• Java
• Javascript examples
• Web forms (links)
• Fancy web page animation (link)
• Custom Google maps (link)

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4. You have time on your hands

• Is COMP 110 right for you?
• Time commitment 10-12 hours/week
• Gets harder after drop point
• Surviving COMP 110
• Allocate time, work hard
• Start early on assignments
• Make use of resources
• office hours, recitation, email

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3. Program, Program, Program

• Course involves lots of programming
• No essays
• What makes programming tough?
• Programming assignments expected to be complete
  and functional
• Computer unforgiving with mistakes

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2. You do not have to purchase a textbook

• We will use online reading
• Electronic books from UNC library
• Web sites for reference
• Purchase hardcopy
• If you do not like reading longer text from the
  computer screen
• Ask me which ones

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1. Learn a lot
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Top 10 reasons to take COMP 110

• 10. Want to be a Computer Science major
• 9. Complete a math or other requirement
• 8. Like solving puzzles, tinkering, learning how
  things work
• 7. Want to become less scared of computers
• 6. Use computer in your own field
• 5. We will learn programming for the web
• 4. You have time on your hands
• 3. Program, Program, Program
• 2. You do not have to purchase a textbook
• 1. Learn a lot

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Other COMP courses

• Other COMP 110 sections MWF 3-415pm
• COMP 116 Intro to Matlab
• COMP 401 For experienced programmers
• More general COMP courses
• COMP 80 Freshman, Assistive Technology
• COMP 380 Computers and society
• COMP 4 (Spring) Power Tools for the Mind

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Course Web Page

• Course home page
• http//www.cs.unc.edu/dorianm/comp110
• Lectures, recitation, assignments
• UNC Blackboard System
• http//blackboard.unc.edu
• List grades
• Online surveys and turn-in

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Weekly Schedule

• Lecture Monday Wednesday
• Recitation Friday
• Time 2-315 pm
• Place Sitterson 014

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Lecture Format

• Big picture
• Present new material
• Analogy
• Concept
• Programming examples
• In-class exercises
• work in groups
• Lecture notes posted 3-days ahead
• When possible
• Notes might change

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Friday is Recitation!

• Attendance mandatory
• Mini-lab
• Hands-on programming practice
• Answer questions from lecture
• Group activities
• Should always have a laptop

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Assignments Exams

• Programming
• 6-7 assignments
• Problem solving
• 5 assignments
• Exams Mid-term, final
• In class, closed book

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Late policy

• Generally no late assignments accepted
• Exceptions
• Documented personal emergency
• Cleared in days before due date

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Collaborating

• Dont cheat!
• You can
• talk to each other about the lecture topics
• talk about assignment requirements
• work in groups during recitation on recitation
  assignments only
• You should
• do your own assignments -- design and code
• You should never
• talk to each other about assignment solutions
• share code -- it is easy to detect and we will
  prosecute
• Pledge Form

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Grades

• Programming Assignments 40
• Homeworks 15
• Midterm Exam 15
• Final Exam 25
• Class Participation 5
• In class, office hours, email, etc

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Free Software

• Javascript
• Text editor
• Web browser
• AFS file system
• Java
• JAVA SDK
• Eclipse

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For Friday

• Bring laptop to recitation
• Bring Ethernet cable to recitation
• On BlackBoard
• Complete survey to introduce yourself
• Read Honor pledge and sign it

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Questions so far

• Check questions online

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Next How does the internet work?

• We will program for the web
• Must have overview of web
• Friday we create web pages

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Geography review

• 2,865 miles apart
• Seattle Chapel Hill

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Browsing a web page

• University of Washington, Seattle Wa
• http//www.washington.edu/
• Where is the web page?
• Web server (a computer) in Seattle WA
• How does it get to your computer?
• transmitted over internet (network of computers)

UNC, Chapel Hill NC
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Requesting web page

• Our computer sends a web page request to the
  server
• Web server sends response
• Web messages divided into packets of
  information

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The internet

• Web of computers
• Wide Area Network (WAN)
• Local Area Network (LAN)

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Internet backbone in UShigh-high speed connection
Router High speed network

• Router a computer that passes packets
• Reference
• http//www.cybergeography.org/atlas/more_isp_maps.
  html
• Other networks http//navigators.com/isp.html

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Where is the web page?

• DOS command tracert www.washington.edu
• Trace result (computers between us and web site)
• ciscokid-cs.net.unc.edu 152.2.31.1
• ciscokid.net.unc.edu 152.2.255.254
• unc7600.internet.unc.edu 128.109.36.254
• rtp7600-gw-to-unc7600-gw.ncren.net
  128.109.70.33
• nlr-atl-to-rtp7600.ncren.net 128.109.70.106
• 216.24.186.34
• denv-chic-36.layer3.nlr.net 216.24.186.5
• seat-denv-58.layer3.nlr.net 216.24.186.7
• hnsp2-wes-ge-2-1-0-802.pnw-gigapop.net
  209.124.179.45
• uwbr-ads-01-te3-1.cac.washington.edu
  209.124.176.23
• uwcr-ads-01-vlan1802.cac.washington.edu
  205.175.101.9
• uwcr-ads-01-vlan3829.cac.washington.edu
  205.175.101.118
• acar-ads-01-vlan3802.cac.washington.edu
  205.175.108.10
• www11.cac.washington.edu 140.142.11.167

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Wide Area Network (WAN) Analogy

• WAN
• Network at US level
• Analogy
• Web page request equivalent to passing envelop
  between students
• Envelopes
• Packets of web request and response
• Students
• router computer that relays messages
• Router connected by wire to neighboring router
  (student)

Router (student) High speed network
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WAN Network Rules

• Message passing between router (student)
• Along same row or one row back
• Packets can traverse different paths
• Dropped packets (envelops)
• Router too busy
• Router problem

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Local Area Network

• On the scale of classroom

Local
Local
WIDE AREA
Local
Local
Local
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Local Area Network (LAN)

• Computers share same channel
• Ethernet for wired connection
• 802.11 for wireless

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Local Area Network (LAN) Analogy

• LAN
• connecting computers in a room
• LAN technology called Ethernet
• Analogy
• Sending packets equivalent to students calling
  out
• All computers connected to same wire (students
  can hear each other)
• Packet sending
• Students shout out
• Student
• Represents your computer
• Rules
• Shout out, back off, shout out again

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Network securityWAN Denial of service

• Web server overloaded by bombardment of packets
• Analogy all students send packets to one
  computer

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Network security LAN Privacy, ease dropping

• Third party listen to packets
• Analogy Everyone can hear messages

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Questions

• Wide Area Network

• Local Area Network
• Sitterson 014

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For Friday

• Bring laptop to recitation
• Bring Ethernet cable to recitation
• On BlackBoard
• Complete survey to introduce yourself
• Read Honor pledge and sign it