masm错误A2075:跳转目标太远:30个字节

Question

我的女士给我一个作业,我必须制作一个程序,通过键盘输入并检查嵌套括号的传统顺序.例如:

input = {[()]},output = correct format, input =({[]})output = wrong

我的节目:

.model small

.stack 100h

.386

.data

msg1 db "this is a correct format of nested brackets$"
msg2 db "this is no a correct format of nested brakets$"

.code

main proc 
mov ax,@data
mov ds,ax

mov cx,15

push '#'
l1:

mov ah,1
int 21h

cmp al,'['
je pushh1

cmp al,'{'
je pushh2

cmp al,'('
je pushh3

cmp al,']'
je pop1

cmp al,'}'
je pop2

cmp al,')'
je pop3

jmp ser

pushh1:

pop dx
cmp dx,'('

push dx

je wrongorder

movzx dx,al

push dx

jmp ser

pushh2:

pop dx

cmp dx,'['

je wrongorder

cmp dx,'('

je wrongorder

push dx

movzx dx,al

push dx

jmp ser

pushh3:

pop dx

cmp dx,'{'

push dx

je wrongorder

movzx dx,al

push dx

jmp ser

wrongorder:

mov dx,'*'

push dx

jmp ser

pop1:

pop dx

cmp dx,'#'

push dx

je ser

pop dx

cmp dx,'{'

push dx

je ser

pop dx

cmp dx,'('

push dx

je ser

pop dx

jmp ser

pop2:

pop dx

cmp dx,'#'

push dx

je ser

pop dx

cmp dx,'('

push dx

je ser

pop dx

cmp dx,'['

push dx

je ser

pop dx

jmp ser

pop3:

pop dx

cmp dx,'#'

push dx

je ser

pop dx

cmp dx,'{'

push dx

je ser

pop dx

cmp dx,'['

push dx

je ser

pop dx

ser:

cmp al,'q'

je labo

loop l1



labo:

mov ah,2

mov dl,0ah

int 21h

mov dl,0dh

int 21h


mov ah,2h

pop dx

;int 21h

cmp dx,'#'

je labe

cmp dx,'#'

jnz labr



labe:

mov dx, offset msg1

mov ah,9h

int 21h

jmp lab8

labr:

mov dx, offset msg2

mov ah,9h

int 21h


lab8:


mov ah,4ch

int 21h

main endp

end main

但是当我编译这段代码时,masm会向我显示一个错误:

jmp目的地太远了30个字节.

请告诉我该怎么做才能摆脱这条消息并运行我的程序.

Answer 1

loop l1导致错误.LOOP只能执行短跳转(-128到+127个字节).替换它

dec cx
jne l1