Hi, Can anyone please describe what does typedef represent in C? thanks!

typedef is a way of making up your own data type names. For example, instead of: int i; short s; you could have: typedef int myInt; typedef short myShort; myInt i; myShort s; i and s are exactly the same in both instances. You've just defined a new data type names. A more useful example might be: typedef unsigned char bit8; typedef unsigned short bit16; typedef unsigned long bit32; bit8 smallCount; bit32 largeCount; How about a type name for a structure. Instead of: struct person { char name[50]; short age; short height; }; struct person me; struct person you; struct person *personPointer; You could have: typedef struct Person { char name[50]; short age; short height; }; Person me; Person you; Person *personPointer;

Thanks! It was a great help. I am only used to Java. Just starting to learn C and found these struct and typedef different from Java! thanks!