Question

用汇编语言编制一个计算从2开始的N个偶数之和，将结果显示出来

用汇编语言编制一个计算从2开始的N个偶数之和，将结果显示出来例如N=3 计算结果为2+4+6=12

• 你的回答被采纳后将获得：
• 系统奖励15（财富值+成长值）+难题奖励20（财富值+成长值）

Answer 1

        CODE  SEGMENT
              ASSUME    CS:CODE
      START:  PUSH      CS
              POP       DS
              PUSH      CS
              POP       ES
              MOV       BP,0
         @0:
              MOV       AH,1
              INT       21H
              CMP       AL,13
              JE        @1
              SHL       BP,1
              MOV       DI,BP
              SHL       BP,1
              SHL       BP,1
              ADD       BP,DI
              AND       AL,0FH
              XOR       AH,AH
              ADD       BP,AX
              JMP       @0
         @1:
              MOV       CX,BP
              XOR       AX,AX
         @2:
              ADD       AX,CX
              LOOP      @2
              SHL       AX,1
              CALL      LFCR
              CALL      DSPAX
              MOV       AH,4CH
              INT       21H

;=======================================
       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
;==================================
        LFCR  PROC      NEAR
              PUSH      AX
              PUSH      DX
              MOV       AH,2
              MOV       DL,13
              INT       21H
              MOV       DL,10
              INT       21H
              POP       DX
              POP       AX
              RET
        LFCR  ENDP
;================================
        CODE  ENDS
              END       START