Aside: Ben's undefined C example

more C

• Jim's matrix example
• Jim's word list example

C topics to discuss using those examples

• strings (i.e. char* with trailing null to mark end)
• structs, typedef, malloc and how they work together
• casting types : explicit (i.e. ((int) 1.0) or ((float) 23)) or implicit (i.e. "int i=3.2")
• compiling multiple files into one program

chap 2 - continued

Discuss these ideas using the CMU slides or other sources ...

bitwise operators ; logical operators

&    bitwise AND           x & y      treats x as "bit vector"
|    bitwise OR            x | y
^    bitwise XOR           x ^ y
~    bitwise COMPLEMENT    ~ x

&&   logical AND           treats whole thing as "true" or "false"
||   logical OR
!    logical NOT

• little vs big endian - see CMU slides
• The text's show_bytes function - see CMU slides & play around with it on different data
• IEEE floating point - see CMU slides (basic idea at least)

exercises in class

• section 2.2.8 ; practice problems 2.25, 2.26
• practice problem 2.43

The assignment for next Tuesday is posted with both some C coding and exercises from the text.

coming soon - machine assembly

• chapter 3
• see the assembly materials on the resources page
• ... as we head towards the bomb lab