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问题描述
我的太太给我，我必须做出一个计划，将通过键盘输入，并检查嵌套括号的传统秩序的任务。
例如：
My ma'am give me an assignment in which i have to make a program which will take input through keyboard and check the conventional order of the nested brackets.for example:
输入 = {[（）]}，输出 =正确的格式，输入 =（{[]}）输出 =不正确
我的程序：
.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
但是当我编译这个code中的MASM显示我的错误：
but when i compile this code the masm shows me an error:
JMP目的地太远了30个字节。
请告诉我，我应该做些什么来摆脱这个消息并运行我的程序。
Please tell me what should i do to get rid of this message and run my program.
推荐答案
循环L1 导致错误。 LOOP 只能执行短跳跃（-128到+127字节）。通过
loop l1 causes the error. LOOP can only perform short jumps (–128 to +127 bytes). Replace it by
dec cx
jne l1
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