Page 147 - C-Language

Typedef

Typedefs are declarations which have the keyword typedef in front and before the type. E.g.:

typedef int (*(*t0)())[5];

(you can technically put the typedef after the type too - like this int typedef (*(*t0)())[5]; but this
is discouraged)

The above declarations declares an identifier for a typedef name. You can use it like this
afterwards:

t0 pf;

Which will have the same effect as writing:

int (*(*pf)())[5];

As you can see the typedef name "saves" the declaration as a type to use later for other
declarations. This way you can save some keystrokes. Also as declaration using typedef is still a
declaration you are not limited only by the above example:

t0 (*pf1);

Is the same as:

int (*(**pf1)())[5];

Using the right-left or spiral rule to decipher C declaration

The "right-left" rule is a completely regular rule for deciphering C declarations. It can also be useful
in creating them.

Read the symbols as you encounter them in the declaration...

* as "pointer to" - always on the left side
[] as "array of" - always on the right side
() as "function returning" - always on the right side

How to apply the rule

STEP 1

Find the identifier. This is your starting point. Then say to yourself, "identifier is." You've started
your declaration.

STEP 2

https://riptutorial.com/ 123