TREE	EQU	20H			
OUT		EQU	21H			
TST:	
MOV	DPTR,#DATS		
MOV	P2,#TREE
MOV	R0,#0
MOV	R2,#16
CPY:	
CLR		A
MOVC	A,@A+DPTR
MOVX	@R0,A
INC		DPTR				
INC		R0
DJNZ	R2,CPY
LCALL	NOORDER			
;遍歷順序?yàn)锳BCDEFGHIJK。
DATS:	
DB		0BH,41H,42H,43H
DB		44H,45H,46H,00H
DB		47H,48H,49H,00H
DB		4AH,4BH,00H,00H
NOORDER:
MOV	DPH,#OUT			
MOV	DPL,#0
MOV	R2,#0				
CLR		A
CLEAR:	
MOVX	@DPTR,A				
INC		DPTR
DJNZ	R2,CLEAR
MOV	P2,#TREE				
MOV	R0,#0
MOV	DPH,#OUT			
MOV	DPL,#0
MOVX	A,@R0				
MOVX	@DPTR,A				
MOV	R2,A					
INC		R0					
INC		DPTR				
JZ		ORDEND				
NO1:	
MOVX	A,@R0				
INC		R0				
JZ		NO1					
MOVX	@DPTR,A				
INC		DPTR				
DJNZ	R2,NO1				
ORDEND:	
RET