ExplanationIn the above program, the following user-defined functions are given,
int insert (int) : This function is used for insertion of an element,
int del (int) : This function deletes a specific element.
int inorder (struct nodes *) : This function displays the elements in order traversal.
int preorder (struct nodes *) : This function is used to display the list of elements in preorder
traversal.
int postorder (struct nodes *) : This function displays the list of elements in postorder traversal
format.
int show (struct nodes*, int) : This function shows the elements in entered format.
For
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