More C: integer types and expressions; declarations and variables. Readings: KernighanRitchie Chapter 2, C/Variables, C/IntegerTypes.

Theme: C is an imperative language: we think of each step of a program as changing the state of the memory the running program to some new state. Today, we'll talk about what the state actually consists of, and how we name pieces of it so the compiler understands what we want to do with it.

See C/Variables and C/IntegerTypes for details; we discussed declaring variables (but not style considerations) and the basic integer types up through integer literals and arithmetic operations. We didn't talk about other operators on integers; these will sneak in later.