#include <stdio.h>

typedef struct NODE *pNODE;
struct NODE {
	char nodeLabel;
	pNODE leftmostChild, rightSibling;
};

		void preorder(pNODE n)
		{
			pNODE c; /* a child of node n */

			printf("\%c\n", n->nodeLabel);
			c = n->leftmostChild;
			while (c != NULL) {
				preorder(c);
				c = c->rightSibling;
			}
		}