exit: mov ah,4ch
      int 21h
prompt proc
       mov ah,9
       int 21h
       ret
prompt endp
crlf   proc
       mov dl,0ah
       mov ah,2
       int 21h
       mov dl,0dh
       mov ah,2
       int 21h
       ret
crlf   endp

whitespace proc
           mov dl,20h
           mov ah,2
           int 21h
           ret
whitespace endp

putindec proc
         push cx
         mov bl,0
ppp:     mov ah,1
         int 21h
         cmp al,0dh
         je putinexit
         sub al,30h
         mov ah,0
         xchg al,bl
         mov bh,10
         mul bh
         xchg al,bl
         add bl,al
         jmp ppp
putinexit:pop cx
          ret
putindec endp

putoutdec proc
          push cx
          mov nozero,0
          mov cl,100
          call main
          mov cl,10
          call main
          mov cl,1
          call main
          cmp nozero,0
          jne ll
          mov dl,30h
          mov ah,2
          int 21h
ll:       pop cx
          ret
main  proc
      mov al

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