Qualifiers
Short, long
short - 4 bytes long - 8 bytes unsigned const
Primitives
char, int, double, float
Define
can do #define to replace text within code with other text
- can use it for types
- common pitfalls for PEMDAS arithmetic if replacing math
When is the source code modified? Preprocess, compilation, or what?
Pointer
Pointers hold an address
We use * to dereference and & to get reference
e.g. * to get value within and & to get address of
declaration of pointer
int *a
usage
printing a returns pointer value (the address in the pointer)
printing *a returns value in the pointer address
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Sizeof
In relation to char A char is 1 byte So a short is 4 bytes, long is 8 bytes and they return those on sizeof call
QUIZ: Pointer incremenetation
Pointer data type matters Incrementing a pointer increases the pointer value by the sizeof the pointer data type
QUIZ: array name is a const pointer
int a[]
a is a const so cannot modify!!!
sizeof(a) returns number of elements times sizeof(int) or whatever data type