Chapter 4 exercises assigned, due monday

# Operators
C emphasizes *expressions* rather than statements.

Expressions are built from variables, constants, and operators.

C provides 5 binary arithmetic operator (arithmetic meaning it requires two things to operate on):
- Addition
- Subtraction
- Multiplication
- Division
- Modulus

Unary operators only require *one* thing to operate on. 
- Positive and minus signs

Positive and negative signs have a higher precedence then binary arithmetic operations, and binary arithmetic operations follow the normal order of operations. 

## Assignment Operators
- Simple assignment: `=` stores a value into a variable after evaluating an expression
```c
int v;
int e = 5;
// Simple assignment
v = e;
```