CS 100, Summer 2001
Tuesday, 6/26
Lecture 2 
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Introduction:
+ Collect Survey
+ Collect Exercise 1
Announcements:
+ Exercise 2 due Wednesday, 6/27
+ Assignment 1 due Thursday, 6/28
+ reading: Savitch 3.1, 3.2 (only while), 3.4 and Chapman (Ch. 1)
+ how to pick up work (post-lecture, or Carpenter)
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Topics:
+ CS 100 Philosophy
+ Algorithms
+ Java language concepts
+ demo Java/CodeWarrior
+ tokens
+ statements
+ variables and assignments
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Summary from lecture 1 
+ Welcome to CS 100
+ Course procedures (requirements)
+ Process of programming (problem solving)
+ Computer languages
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CS100 philosophy:
+ assume NO experience 
  - be respectful of others if you have experience!
  - inexperience != bad grade
+ some people who have experience don't do well (bad habits)
+ some people who've never programmed have been at the top of the class  
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Your responsibilities:
+ reading
+ lecture
+ assignments
+ read newsgroup
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Process of programming: 
+ You learn the magic incantations necessary to turn natural language
  into something the computer can use 
+ Recipes!
+ Are you trying to bake the cake without a recipe?
+ Input/process/output 
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Java Language concepts:
+ from before: comments, whitespace, identifiers 
+ Good naming rules:
  1. meaningful
  2. unique
  - e.g., do not do
    String Name = "Kiri";
    String nAme = "Ben";
    String naMe = "Jay";
    String namE = "Hongjie";
  - This is legal in Java, but apt to cause confusion. Bad style.
+ Reserved words (sometimes called keywords)
  - part of the language
  - not available for use as identifiers (where users redefine)
  - ex) public, class, void
  - see Appendix 1
+ Primitive data:
  - boolean, char, byte, short, int, long, float, double
  - we'll use boolean, char, int, double and skip the rest
+ Examples:
  - int int;? (error, reserved word)
  - int nStudents = 51;
  - double avgScore = 86.3;
  - char cs100Grade = 'A';
  - boolean goodClass = true;
+ Remember: all types have finite space!  Some numbers may be too big
  to fit.
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+ Strings
  - collections of characters
  - String myName = "Kiri Wagstaff";
  - string arithmetic (concatenation):
  - String myName = "Kiri" + "Wagstaff"; // this has no space!
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COLLECT Exercise 1, Survey

Pick up as you go out: 
Exercise 2 (java intro)