data segment
str db “This is an example for test!”
count=$-str
data ends
code segment
assume cs:code,ds:data
start:mov ax,data
mov ds,ax
mov cx,count
lea bx,str
next:mov ax,[bx]
cmp ax,‘a’
jnz next1
inc dl
next1:inc bx
dec cx
jnz next
mov ah,4ch
int 21h
code ends
end start
找不到错误在哪里
顺便问一下用debug怎样调试与查看错误

data segment
str db “This is an example for test!”
count=$-str
data ends
code segment
assume cs:code,ds:data
start:mov ax,data
mov ds,ax
mov cx,count
lea bx,str
next:mov ax,[bx]
cmp ax,‘a’
jnz next1
inc dl
next1:inc bx
dec cx
jnz next
mov ah,4ch
int 21h
code ends
end start

错误在哪里啊！
本人刚刚学汇编

data segment
str db “This is an example for test!”
count=$-str
data ends
code segment
assume cs:code,ds:data
start:mov ax,data
mov ds,ax
mov cx,count
lea bx,str
next:mov ax,[bx]
cmp ax,‘a’
jnz next1
inc dl
next1:inc bx
dec cx
jnz next
mov ah,4ch
int 21h
code ends
end start

不是中文引号的问题，题目是：统计一字符串中小写字母‘a’的个数,并将统计结果存放到DL寄存器中