例6：设缓冲区DATA中有一组单字节有符号数，以0为结束标志。写一个程序实现如下功能：把前5个正数依次送入缓冲区PDATA，把前5个负数依次送入缓冲区MDATA；如正数或负数不足5个，则用0补足。

自解：

 1 DSEG SEGMENT

 2 DATA DB -1,1,-2,2,3,-3,-4,4,5,-5,-6,6,0

 3 PDATA DB 0,0,0,0,0

 4 MDATA DB 0,0,0,0,0

 5 DSEG ENDS

 6 ;------------------------------------

 7 CSEG SEGMENT

 8     ASSUME DS:DSEG,CS:CSEG

 9 START:

10     MOV AX,DSEG

11     MOV DS,AX

12

13     MOV BX,OFFSET DATA

14     XOR SI,SI

15     XOR DI,DI

16     MOV AL,0

17         DEC BX

18    UP:  INC BX

19   AGAIN:CMP AL,[BX]

20     JZ OK

21         JG NEXT

22     CMP DI,5

23         JAE UP

24         INC DI

25     MOV DH,[BX]

26     MOV MDATA[DI],DH

27         INC BX

28         JMP AGAIN

29  NEXT:

30     CMP SI,5

31         JAE UP

32         INC SI

33     MOV DL,[BX]

34     MOV PDATA[SI],DL

35         INC BX

36         JMP AGAIN

37

38 OK:     MOV AH,4CH

39     INT 21H

40 CSEG ENDS

41     END START

例解：

 1 MAX_COUNT = 5

 2 DSEG SEGMENT

 3 DATA DB 3,-4,5,6,-7,8,-9,-10,-1,-32,-123,27,58,44,-12,0

 4 PDATA DB MAX_COUNT DUP(?)

 5 MPATA DB MAX_COUNT DUP(?)

 6 DSEG ENDS

 7 ;------------------------------------------------------

 8 CSEG SEGMENT

 9         ASSUME DS:DSEG,CS:CSEG

10 START:

11         MOV AX,DSEG

12         MOV DS,AX

13

14         MOV CX,MAX_COUNT

15         MOV SI,OFFSET PDATA

16         MOV DI,OFFSET MPATA

17         MOV AL,0

18  NEXT1: MOV [SI],AL

19         MOV [DI],AL

20         INC SI

21         INC DI

22         LOOP NEXT1

23

24         MOV BX,OFFSET DATA

25         XOR DI,DI

26         XOR SI,SI

27  NEXT2: MOV AL,[BX]

28         INC BX

29         CMP AL,0

30         JZ  OK

31         JG  PLUS

32         CMP DI,MAX_COUNT

33         JAE CONT

34         MOV MPATA[DI],AL

35         INC DI

36         JMP SHORT CONT

37  PLUS:  CMP SI,MAX_COUNT

38         JAE CONT

39         MOV PDATA[SI],AL

40         INC SI

41         JMP SHORT CONT

42  CONT:  MOV AX,SI

43         ADD AX,DI

44         CMP AX,MAX_COUNT+MAX_COUNT

45         JB  NEXT2

46    OK:  MOV AH,4CH

47         INT 21H

48 CSEG ENDS

49      END START

例6：设缓冲区DATA中有一组单字节有符号数，以0为结束标志。写一个程序实现如下功能：把前5个正数依次送入缓冲区PDATA，把前5个负数依次送入缓冲区MDATA；如正数或负数不足5个，则用0补足。,布布扣,bubuko.com