About typedef

[bindiya182003]

Can anyone tell me the use of typedef in C
What will this statement do:

typedef unsigned char byte;

plz help me......

[JosAH]

Can anyone tell me the use of typedef in C
What will this statement do:

typedef unsigned char byte;

plz help me......

Think of an ordinary variable definition; e.g.

[code=c]
int i;
char* p;
[/code]

This defines two variables 'i' and 'p'. Now prepend them with the 'typedef' keyword:

[code=c]
typedef int i;
typedef char* p;
[/code]

Now you have to aliases 'i' and 'p' for the typed 'int' and 'char*' so you may now
use them as:

[code=c]
i ii; // an int
p pp; // a char*
[/code]

kind regards,

Jos

[bindiya182003]

Thanks a lot for your answer...One more doubt How are the datatypes char and unsigned char different

[JosAH]

Thanks a lot for your answer...One more doubt How are the datatypes char and unsigned char different

I already answered that question in your other thread.

kind regards,

Jos