Computer Science 15-111 (Sections A & B), Spring 2007

Class Notes: 26-Jan-2007

· Quiz 1 Results:

o q8 and q10 à bonus!

o Top scores: 104, 101, 99, 98, 96, 95, 95, 94, 94, …

· Quiz 1 Retake: Friday, 2-Feb-2007 in class

o Optional for those receiving 85 or higher

o Your score: higher of original and retake score

· Homework 3.2 Deadline: moved to 8pm on Monday (time for office hours)

· Test 1 moved to 21-Feb-2007

Topic Outline:

1. Quiz 1 Solutions

2. WordSearch Redux

a. Static methods, static variables

b. try/catch

c. etc…

3. App A.3: Manipulating Bits

a. Bitwise Operators: And (&), Or (|), Xor (^), Not (~)

b. Shift Operators:

i. Shift Left (<<)

ii. Shift Right, Sign Extended (>>)

iii. Shift Right, 0-filled (>>>)

c. Multiplication and Division via shifting

d. Storing bytes in int’s by shifting and masking

4. Pixel image demo

5. Return quiz 1