What is storage classes? explain in brief

A storage class define the scope and lifetime of variables and functions with a c program proceed the type them modified we have four different storage classes in c program
. Auto
. Register
. Static
. Extern

Auto storage class
Is the default storage class for all local variables

Register storage class
Is used to define local variable that should be stored in a register instead of Ram

Static storage class
On is used on a global variable it cause only one one copy of that members to be shared by all the object of its class

Extern storage class
Is used to give a reference of global variable that is visible to all the program files

What is enumeration ? Explain how to create enumeration with example