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#2
zaixuexi2011-04-21 15:52
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程序代码：data segment
str db "This is an example for test!"
count=$-str
data ends
code segment
assume cs:code,ds:data
start:mov ax,data
mov ds,ax
mov cx,count
lea bx,str
next:mov ax,[bx]
cmp ax,‘a’
jnz next1
inc dl
next1:inc bx
dec cx
jnz next
mov ah,4ch
int 21h
code ends
end start
小写字母‘a’的个数,并将统计结果存放到DL寄存器中，这个程序错误在那里 str db "This is an example for test!"
count=$-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