11.asm

学生档案管理系统

DATA SEGMENT	;定义数据段
	SUM	DW	?	;定义数据区
	CN	DW	64H	;循环次数100
	STR	DB	'1+2+3+4+...+100=','$'	;定义输出字符串
DATA ENDS
CODE	SEGMENT
	ASSUME	CS:CODE,DS:DATA
START:	PUSH	DS
	XOR	AX,AX
	PUSH	AX
	MOV	AX,DATA
	MOV 	DS,AX
	
	MOV	AX,0
	MOV 	CX,0
LP:	INC 	CX
	ADD	AX,CX
	CMP	CX,CN
	JB	LP
	MOV	SUM,AX

	MOV 	AH,09
	MOV	DX,OFFSET STR
	INT 	21H
	
	MOV 	AX,SUM
	XCHG 	AH,AL
	MOV	AH,0
	CALL	DISPBYTE

	MOV	AX,0
	MOV	AL,LOW SUM
	CALL	DISPBYTE
	
	MOV	AH,4CH
	INT 	21H
DISPBYTE PROC NEAR
	PUSH	CX
	PUSH	DX
	MOV	CL,4
	SHL	AX,CL
	MOV 	DL,AH
	CMP 	DL,0AH	
	JNC 	DISPHA	;dl>=0a?
	ADD	DL,30H
	JMP	DISPH0
DISPHA:	ADD 	DL,37H	;ip=118	
DISPH0:	PUSH 	AX	;ip=11B
	MOV	AH,02
	INT 	21H
	POP 	AX

	SHR 	AL,CL
	MOV	DL,AL
	CMP 	DL,0AH	;dl>=0a?
	JNC 	DISPLA
	ADD 	DL,30H
	JMP	DISPL0
DISPLA:	ADD 	DL,37H	;ip=12F
DISPL0:	MOV 	AH,02	;ip=132
	INT 	21H	
	POP	DX
	POP	CX
	RET
DISPBYTE ENDP 
CODE	ENDS
	END	START