关于输出字符串个数的问题 小弟求救啊

[xulidong20080]

请看一下下面代码：
NAME MYEXAMPLE
dseg segment
mess1 db 'NAME:','$'
mess2 db 'NO.:','$'
mess3 db 'CLASS:','$'
dseg ends
sseg segment stack
db 80h dup(0)
sseg ends
cseg segment
ASSUME cs:cseg,ss:sseg,ds:dseg
START:mov ax,dseg
mov ds,ax
call myprint

mov dx,offset mess1
mov ah,09h
int 21h

call myprint
call myprint
mov dx,offset mess2
mov ah,09h
int 21h
call myprint
call myprint
mov dx,offset mess3
mov ah,09h
int 21h
call myprint
call myprint
mov ah,4ch
int 21h
myprint proc NEAR
mov ah,02h
mov dl,0dh
int 21h
mov dl,0ah
int 21h
ret
myprint endp
cseg ends
end start