汇编语言，以10进制的方式显示数字

printit proc near
    
    test ax,8000h
    jz p
    neg ax    
    mov cx,ax
    mov dx,2dh
    mov ah,2
    int 21h
    mov ax,cx
    mov dx,0
p:    mov bx ,10
    div bx
    mov bx,dx
    mov dx,ax
    add dx,30h
    mov ah,02h
    int 21h
    mov dx,bx
    add dx,30h
    mov ah,02h
    int 21h
    ret
printit endp