declaring a struct with its fields as a struct

This is a discussion on declaring a struct with its fields as a struct within the C Programming forums, part of the General Programming Boards category; hi, i was wondering if someone could tell me what it means to use a 'struct' as its fields? typedef ...

  1. #1
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    declaring a struct with its fields as a struct

    hi, i was wondering if someone could tell me what it means to use a 'struct' as its fields?

    typedef struct Node {
    struct Node * pre;
    struct Node * next;
    void * data;
    } Node;

    this would be used for a linked list. why do you add a 'struct' when declaring struct Node * pre;
    thanks. clear help is much appreciated = )

    and also, would omitting Node after the close parenthesis at the end make a difference? i normally see an array but if it isn't, does it make a difference to add it there or not? thanks.

  2. #2
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    First off your typedef is incorrect... you will probably get a "redefinition of struct Node" error when you try to compile it. Try it like this...
    Code:
    typedef struct t_Node {
        struct t_node * previous;
        struct t_note * Next;
        void * data; 
    } Node.
    Second t_Node* previous; and t_Node* Next; are not structs. They are pointers to structs of type t_node. (That's what the * means). So you are not imbedding structs in structs. You have a struct that contains pointers to other structs in your list.

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