CSE 113

1
CSE 113

• Week 1
• January 14 18, 2008

2
Monday

• Syllabus
• Course Policies

3
Wednesday Announcements

• If you do not have a syllabus, please come get
  one.
• If you have not signed and turned in the last
  page of the syllabus, please do so.
• If you are having registration issues, please
  come and see me.

4
Wednesday Game Plan

• Questions about course/policies
• Recitation Change Form
• Introduce themes of course

5
Wednesday

• How does a computer work?
• What does it really understand?
• How do we speak to a computer?

6
Friday Announcements

• Need syllabus? Come down and get one.
• Make sure to turn in signed last page of syllabus
• Lab change form fill out and return if needed
• No class Monday

7
Friday Game Plan

• Introduction to DrJava environment
• Expressions
• Statements

8
Friday

• DrJava is broken up into three panes files,
  definitions, interactions
• We will spend the first part of the semester
  working in the interactions pane
• There we can type Java code and have DrJava
  evaluate it for us

9
Friday

• Expressions are code that can be evaluated to
  produce a result
• Arithmetic expressions
• 3 4
• Hit enter, and DrJava reports 7 as the result of
  evaluating that expression

10
Friday

• Putting a at the end of an expression turns it
  into a statement
• DrJava does not return the value that results
• You can use a special statement,
  System.out.println(Text)
• To print the word Text to the screen.

11
Friday

• The types of things are very important to Java
• Numbers that are whole numbers (integers) are
  treated differently than those with a fractional
  part (real numbers)
• Typing in ½ gives a result that may be surprising