"typedef" to create user types

[Humble]

“typedef” is a keyword which can be used to give an alias/symbolic name to “types” .. That said, simplification is one of the best use case of typedef usage..

For ex: from standard header ..

typedef struct
  {
    int quot;                   /* Quotient.  */
    int rem;                    /* Remainder.  */
  } div_t;





Then you can use 'div_t' for rest of your type variables. 

typedef is a compile time stuff.. You can compare 'typedef' with "#defines" ..but there are differences ..

*) typedefs are bound to scoping rules where #defines are not.. #defines are valid till end of file or corresponding #undef.

*) As mentioned above, typedefs are compiler stuff where #defines are preprocessor.

*) for alias definitions on pointer types its better to use typedefs than #defines.

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