Question

如何用汇编语言实现十进制到二进制的转换

Answer 1

;输入不超过65535的10进制数，将其以二位的形式显示
        CODE  SEGMENT
              ASSUME    CS:CODE
              ORG       100H
      START:
              JMP       BBB
           X  DW        0
        MSG1  DB        10,13,'please input a number:','$'
        MSG2  DB        10,13,'                 ','$'

        BBB:
              PUSH      CS
              POP       DS
              LEA       DX,MSG1
              MOV       AH,9
              INT       21H
      
              LEA       BX,X
              MOV       AX,0
              PUSH      AX
     AGAIN1:
              MOV       AH,1
              INT       21H
              CMP       AL,13
              JE        LINE0
              SUB       AL,30H
              MOV       AH,0
              MOV       SI,AX
              POP       AX
              MOV       CL,10
              MOV       CH,0
              MUL       CX
              ADD       AX,SI
              PUSH      AX
              JMP       AGAIN1
      LINE0:
              POP       AX
              MOV       WORD PTR[X],AX
              LEA       DI,MSG2
              INC       DI
              INC       DI
              MOV       CX,16
              MOV       AX,WORD PTR[X]
     AGAIN2:
              ROL       AX,1
              JC        LINE1
              MOV       BYTE PTR [DI],'0'
              JMP       LINE2
      LINE1:
              MOV       BYTE PTR [DI],'1'
      LINE2:
              INC       DI
              LOOP      AGAIN2
      
              LEA       DX,MSG2
              MOV       AH,9
              INT       21H
              MOV       AH,8
              INT       21H

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

Answer 2

把十位数乘以 10，再加上个位数，就是二进制了。