Question

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C : pointer to struct in the struct definition

In my beginer course we need to declare a struct for tree search. I need pointers for reference of same type in each node. This decleration seems incorrect, pnode is not known in this context. How can i archieve my goal?

typedef struct 
{ 
    int value;
    int right;
    int left;
    pnode nextleft;
    pnode nextright;
}node, *pnode;

Answer 1

struct node
{
    int value;
    int right;
    int left;
    struct node *nextleft;
    struct node *nextright;
};

Here, node is within the tag namespace.