Algorithms, Part 3 of 3

1
Algorithms, Part 3 of 3

• Topics
• Disk Quota Exceeded.
• Email Using Pine.
• More Algorithms
• Reading
• Read Pine Tutorial - http//www.washington.edu/pin
  e/tutorial.4/index.html

2
Exceed Disk Quota

• Check our class Website frequently.
• CMSC 104 Section 0301 Homepage.
• http//www.cs.umbc.edu/courses/undergraduate/104/f
  all02/chen/
• Exceed Disk Quota Problem
• Type "oitcleaner" to cleanup cache files from
  previous Web browser usage. Then type quota
  vto view current disk space usage.

3
Emai Using Pine

• We will walk through a set of commands used to
  say Hi to your TA, and sign with your full name
  in the Message Text field, Using Pine, CMSC 104
  Section 301 in the Subject field, and send it to
  kevina1_at_umbc.edu, CC to lichen_at_mitre.org, and
  yourself.
• CC means Carbon copy, used to copy a message
  to an interested party.
• See pine tutorial for details and help.
• Pine Tutorial Website - http//www.washington.edu/
  pine/tutorial.4/index.html

4
Emai Using Pine

• Type pine at the Linux prompt.
• The Main Menu list Pines main options (see
  Figure on the next slide).
• The bottom screen displays a menu of command
  options.

5
Emai Using Pine
6
Emai Using Pine

• Type c to compose an email.
• Note that the bottom screen displays a different
  menu of command options from before.
• means Control key.
• Use arrow keys to move around the fields or
  command options. Different commands are available
  when the cursor is in different fields.
• Type Kevina1_at_umbc.edu in the To field and hit
  Enter Key.
• Use arrow keys to go up and down of the fields
  and left or right to position your cursor. Use
  Backspace key to delete a character.
• Type Lichen_at_mitre.org and your email address in
  the CC field and hit Enter Key.
• Type Using Pine, CMSC 104 Section 301 in the
  Subject field.
• Type Hi Kevin. and sign your name in the
  Message Text field.

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Emai Using Pine
Menu with options of commands and help at the
bottom.
8
Emai Using Pine

• Use Ctrl X to send email and type y to
  confirm. Done!
• To view emails
• Type L to view Folder Lists.
• Position cursor to Inbox and hit Enter key.
• The email you just mailed should be displayed.
• N 1 Date Your Name Using Pine ..
• Position cursor to the email and hit Enter key.
• Now you can read the email that you just sent.
• To quit pine
• Type q to quit pine and type y to confirm.

9
Emai Using Pine
Menu with options of commands and help at the
bottom.
10
Writing Algorithms from Scratch

• Given a problem statement, we are going to write
  the corresponding generic algorithm for the
  solution in terms of input and output.
• We will use the following procedure
• Get input from the user.
• Perform tasks or calculations in order to get the
  correct solution.
• Output results to the user.

11
The Box

• Problem Write an interactive program to compute
  and display the volume and surface area of a
  3-dimensional rectangular box. The program must
  also display the box dimensions. Error checking
  should be done to be sure that all box dimensions
  are greater than zero.
• Input width, length, and height of a box.

12
Drawing a Rectangle

• Problem Write an interactive program that will
  draw a solid rectangle of asterisks () in terms
  of width and length. The program must also
  display the dimensions of the rectangle. Error
  checking must be done to be sure that the
  dimensions are greater than zero.

13
Assignment and Next

• Write an email say Hi to your TA and sign with
  your full name in the Message Text field, Using
  Pine, CMSC 104 Section 301 in the Subject field
  and send it to yourself, lichen_at_mitre.org,
  kevina1_at_umbc.edu. See pine tutorial for help.
  http//www.washington.edu/pine/tutorial.4/index.ht
  ml. Send your email before Monday, September 23,
  200 PM.
• Exam 1 on Monday, Sept. 30.
• Next
• More problem solving and algorithms.