#include "stdio.h"
#define MAX_TREES 10
typedef char DataType;
typedef struct 	Tree_node{
       DataType data;
       struct Tree_node *lchild,*rchild;
}Tree;
typedef Tree * TreeNode ;
TreeNode  Forrest[MAX_TREES];
void preorder(TreeNode  p)
{
    if(p!=NULL)
		{ 
			printf("%c",p->data);
			preorder(p->lchild);	/*前序訪問左兒子*/
			preorder(p->rchild);	/*前序訪問右兒子*/
    }
}
void PreOrder_Forrest()
{
	int i=0;
	for(i;i<MAX_TREES;i++)
		preorder(Forrest[i]);
}
void main()
{
	PreOrder_Forrest();
}