CS208 Introduction to Computer Systems
Monday, 3 April 2023

+ Upcoming schedule
- Programming assignment #3: 4/11
- Online quiz (take as often as you want): 4/15
- In-class exam: 4/19
- Note: new OAR rules--student has to request exam 72 hours ahead

+ Today
- VS Code debugging lab
- queues assignment: memory, pointers, structs 
- the importance of understanding what the heck is going on

+ Lab
- Go to it
- Doing this with multiple-file programs

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+ Memory organization of a C program
- Instructions (fixed-size at compile time, "text")
- Initialized data (fixed-size at compile time, read-only)
- Global variables (fixed-size at compile time, read-write)
- The heap (space you allocate via malloc)
- The system stack (local variables & function parameters)
    (grows from high addresses towards lower)

+ Memory & C pointers
- Variables have types
- You can "typecast" some variables from one
    type to another
- Declaring a variable
- Defining a variable
- Declaring/defining/initializing pointers
- Initializing a variable
- The & unary operator
- The * unary operator

+ C structs
- What are they?
- typedef
- . vs. ->

+ Break

+ The queues assignment