Question

汇编语言求大神解答

Answer 1

        CODE  SEGMENT
              ASSUME    CS:CODE
              
         BUF  DB        1,2,3,0,-1,-2,-3
           N  EQU       $-BUF
         SUM  DW        ?

      START:  PUSH      CS
              POP       DS
              LEA       SI,BUF
              MOV       CX,N
              MOV       BX,0
         @0:
              LODSB
              CBW
              ADD       BX,AX
              LOOP      @0
              MOV       SUM,BX

              MOV       AH,4CH
              INT       21H
        CODE  ENDS
              END       START