Question

汇编语言，怎么让它显示出字符串的长度，用分支程序设计

Answer 1

sseg SEGMENT para stack
dw 256 dup(?)
sseg ENDS

DATA SEGMENT
MSG1 DB 'LENGTH:','$'
MSG2 DB 'OTHER:','$'
SHEX DB '0123456789ABCDEF$'
MAXLEN EQU 200H
DATA ENDS

CODE SEGMENT ;代码段定义
assume CS:CODE,DS:DATA
START:
mov ax,DATA
mov ds,ax

mov ax,0
mov bl,24H
mov di, offset MSG2
MYLOOP:
cmp byte ptr[di], bl
jz EXIT
inc di
inc ax
jmp MYLOOP

EXIT:
push ax
;显示提示消息
mov dx,offset MSG1
mov ah,9h
int 21h

pop ax
call printlen

mov ah,4ch
int 21h

;打印长度子程序，长度保存在ax里
printlen proc near
mov cx,4
PRINTLOOP:
rol ax,1
rol ax,1
rol ax,1
rol ax,1
push ax
mov dl,al
and dl,0FH
mov bx, offset SHEX
add bl,dl
mov dl, byte ptr [bx]
mov ah,2
int 21h
pop ax
loop PRINTLOOP
ret
printlen endp

CODE ENDS

END START

Answer 2

汇编学的这么吊