prog6_5.asm

汇编语言-王爽 源代码 加 卜艳萍版源代码

data  segment
      x1  db  39h
      x2  db  21h
      x3  db  13h
      y  db  ?
data  ends
code  segment
      assume  cs:code,ds:data
start:mov  ax,data
      mov  ds,ax
      mov  bx,offset x2
      mov  cl,[bx]
      add  cl,[bx+1]
      mov  al,[bx-1]
      sub  al,cl
      mov  [bx+2],al
      mov  ah,4ch
      int  21h
code  ends
      end  start