汇编语言:数据段中,字数组ARRAY有N个元素 ,把数组中的负数求绝对值后按降序排列,用子程序实现

2024-12-11 22:45:43
推荐回答(2个)
回答1:

以前回答过:
http://blog.163.com/asm_c/blog/static/2482031132015581028111

用子程序实现,就要麻烦一些,如下:

DATA   SEGMENT
    ARRAY1 DW  0, -1, 2, 3, 4, -5, 6, -7, 8 , 9, -10
    COUNT  EQU $ - ARRAY1
    ARRAY2 DW  20  DUP(?)            ;求绝对值后存入的新数组
    LEN    DW  ?                     ;新数组长度 
    MSG1   DB  13, 10, 'Before  Sort : $'
    MSG2   DB  13, 10, 'After   Sort : $'
DATA  ENDS
CODE  SEGMENT
    ASSUME  CS: CODE, DS: DATA
START:
    MOV   AX, DATA     
    MOV   DS, AX
    MOV   AH, 09H
    LEA   DX, MSG1
    INT   21H          ;显示提示字符串MSG1
    LEA   SI, ARRAY1
    CALL  OUTPUT       ;调用输出数组子程序OUTPUT,显示原始数据
    CALL  Absolute     ;调用求绝对值子程序Absolute,求绝对值
    CALL  SORT         ;调用排序子程序SORT对数组排序
    MOV   AH, 09H
    LEA   DX, MSG2
    INT   21H          ;显示提示字符串MSG2 
    LEA   SI, ARRAY2
    CALL  OUTPUT       ;调用输出数组子程序OUTPUT,显示求绝对值后的数据 
EXIT:
    MOV   AH, 4CH
    INT   21H          ;主程序返回DOS
   
;----------------------------------------------- 
;子程序名:SORT
;功能: 
SORT  PROC  NEAR  
                       ;此处请增添代码
    MOV   CX, COUNT
    SHR   CX, 1
    DEC   CX
S0: PUSH  CX
    MOV   DI, SI
S1: MOV   AX, [DI]
    CMP   AX, [DI + 2]
    JA    S3
    XCHG  AX, [DI + 2]
    XCHG  AX, [DI]
S3: ADD   DI, 2
    LOOP  S1
    POP   CX
    LOOP  S0 
    RET
SORT ENDP
;------------------------------------------------  
;子程序名:Absolute
;功能:求绝对值 
Absolute  PROC  NEAR
                       ;此处请增添代码
    LEA   SI, ARRAY1
    LEA   DI, ARRAY2
    MOV   CX, COUNT
    SHR   CX, 1
ABS:
    MOV   AX, [SI]
    CMP   AX, 0
    JGE   ABS2
    NEG   AX
ABS2:
    MOV   [DI], AX
    ADD   SI, 2
    ADD   DI, 2
    LOOP  ABS
    RET
Absolute  ENDP  
 ;------------------------------------------------  
;子程序名:OUTPUT   
;功能:输出数组
OUTPUT  PROC NEAR  
                       ;此处请增添代码
    MOV   AH, 2
    MOV   DL, 13
    INT   21H
    MOV   DL, 10
    INT   21H
    MOV   CX, COUNT
    SHR   CX, 1
ZH3:
    MOV   AX, [SI]
    CMP   AX, 0
    JGE   ZH0
    NEG   AX
    MOV   [SI], AX
    MOV   AH, 2
    MOV   DL, '-'
    INT   21H
ZH0:MOV   AX, [SI]
    MOV   BX, 10
    PUSH  CX
    MOV   CX, 0
ZH1:MOV   DX, 0
    DIV   BX
    ADD   DL, '0'
    PUSH  DX
    INC   CX
    CMP   AX, 0
    JNZ   ZH1
    MOV   AH, 2
ZH2:POP   DX
    INT   21H
    LOOP  ZH2
    POP   CX
    MOV   DL, ' '
    INT   21H
    ADD   SI, 2
    LOOP  ZH3
    RET
OUTPUT  ENDP
;-------------------------------------------------
CODE   ENDS
    END   START

回答2:

        DATA  SEGMENT

      ARRAY1  DW        0, -1, 2, 3, 4, -5, 6, -7, 8 ,9,-10
       COUNT  EQU       ($-ARRAY1)/2
      ARRAY2  DW        COUNT DUP(?)            ;求绝对值后存入的新数组
         LEN  EQU       COUNT       ;新数组长度
        MSG1  DB        13, 10, 'Before Sort:$ '
        MSG2  DB        13, 10, 'After Sort:$ '
        DATA  ENDS
        CODE  SEGMENT
              ASSUME    CS: CODE, DS: DATA
      START:
              MOV       AX, DATA
              MOV       DS, AX
              MOV       AH, 09H
              LEA       DX, MSG1
              INT       21H         ;显示提示字符串MSG1
              LEA       SI,ARRAY1
              CALL      OUTPUT      ;调用输出数组子程序OUTPUT,显示原始数据
              CALL      ABSOLUTE    ;调用求绝对值子程序Absolute,求绝对值
              CALL      SORT        ;调用排序子程序SORT对数组排序
              MOV       AH, 09H
              LEA       DX, MSG2
              INT       21H         ;显示提示字符串MSG2
              LEA       SI,ARRAY2
              CALL      OUTPUT      ;调用输出数组子程序OUTPUT,显示求绝对值后的数据
              MOV       AH, 4CH
              INT       21H         ;主程序返回DOS

;----------------------------------------------- 
;子程序名:SORT
;功能: 
;-----------------------------------------------
        SORT  PROC      NEAR
;///////此处请增添代码
      ; 数组长度置入cx,字数组首地址置入 si
              PUSH      AX
              PUSH      CX
              PUSH      DX
              PUSH      SI
              PUSH      DI
              PUSHF
              MOV       CX,COUNT
              PUSH      CX
              POP       DX
              DEC       DX
   @SORTWL1:
              MOV       CX,DX
              MOV       DI,SI
   @SORTWL2:
              MOV       AX,[DI+2]
              CMP       AX,[DI]
              JL        @SORTWNEXT  ; 从大到小(无符号换成 JB)
              XCHG      AX,[DI]
              MOV       [DI+2],AX
 @SORTWNEXT:
              INC       DI
              INC       DI
              LOOP      @SORTWL2
              DEC       DX
              JNZ       @SORTWL1
              POPF
              POP       DI
              POP       SI
              POP       DX
              POP       CX
              POP       AX
              RET
        SORT  ENDP
;------------------------------------------------ 
;子程序名:Absolute
;功能:求绝对值 
;-------------------------------------------------
    ABSOLUTE  PROC      NEAR
;///////此处请增添代码
              PUSH      DS
              POP       ES
              LEA       SI,ARRAY1
              LEA       DI,ARRAY2
              MOV       CX,COUNT
      @ABS1:
              LODSW
              AND       AX,AX
              JNS       @ABS2
              NEG       AX
      @ABS2:
              STOSW
              LOOP      @ABS1
              RET
    ABSOLUTE  ENDP
;------------------------------------------------ 
;子程序名:OUTPUT 
;功能:输出数组
;-------------------------------------------------
      OUTPUT  PROC      NEAR
;///////此处请增添代码
              MOV       CX,COUNT
      @OUT1:
              LODSW
              CALL      DSPAXS
              MOV       DL,32
              MOV       AH,2
              INT       21H
              LOOP      @OUT1
              RET
      OUTPUT  ENDP
      
;===============================
      DSPAXS  PROC      NEAR
              PUSH      AX
              TEST      AX,8000H
              JNS       @DSPAXS1
              PUSH      AX
              PUSH      DX
              MOV       AH,2
              MOV       DL,'-'
              INT       21H
              POP       DX
              POP       AX
              NEG       AX
   @DSPAXS1:
              CALL      DSPAX
              POP       AX
              RET
      DSPAXS  ENDP
;===============================
       DSPAX  PROC      NEAR
              PUSH      AX
              PUSH      BX
              PUSH      CX
              PUSH      DX
              PUSHF
              XOR       CX,CX
              MOV       BX,10
    @DSPAX1:
              XOR       DX,DX
              DIV       BX
              INC       CX
              OR        DX,30H
              PUSH      DX
              CMP       AX,0
              JNE       @DSPAX1
              MOV       AH,2
   @DISPAX2:
              POP       DX
              INT       21H
              LOOP      @DISPAX2
              POPF
              POP       DX
              POP       CX
              POP       BX
              POP       AX
              RET
       DSPAX  ENDP
;==============================
      
        CODE  ENDS
              END       START

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