#include<stdio.h>
#include<stdlib.h>
struct node{
int k;
struct node* prev;
struct node* ls;
struct node* ps;
};
struct node *dodaj_element(struct node *root, struct node* nowy);
int main(){
struct node *root=NULL; struct node *nowy=NULL;
root=dodaj_element(root,1);
root=dodaj_element(root,2);
root=dodaj_element(root,3);
}
struct node *dodaj_element(struct node *root, int n)
{if(root==NULL)
{root=(struct node*)malloc(sizeof(struct node));
root->k=n;
root->prev=NULL;
root->ls=NULL;
root->ps=NULL;
}
else if(n< (root->k))
{if(root->ls!=NULL)
dodaj_element(n,root->ls);
}
else{
struct node *nowy = NULL;
nowy=(struct node*)malloc(sizeof(struct node));
nowy->k = n;
nowy->ls= NULL;
nowy->ps = NULL;
nowy->prev = root;
root->ls=nowy;
}
}
else{
if(root->ps!=NULL)
{
dodawanie(n,root->ps);
}
else{
node *nowy = (node*)malloc(sizeof *node);
nowy->k = n;
nowy->ls = NULL;
nowy->ps = NULL;
nowy->prev = start;
root->ps=nowy;
}
}
return root;
}
void in_order(struct node *root)
{
if(root->ls != NULL)
in_order(root->ls);
printf("%dn", root->k);
if(root->ps!= NULL)
in_order(root->ps);
}
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