data segment out db 'Input the password please:$' pass db 6 dup(?) data ends code segment assume ds:data,cs:code start:mov ax,data mov ds,ax; mov cx,6 lea dx,out mov ah,09h int 21h lea di,pass again:mov ah,07h;输入不显示字符 int 21h mov [di],al mov dl,'*' mov ah,02h int 21h loop again mov ax,4c00h int 21h code ends end start