汇编语言编程求助,急!!!

2025-02-07 15:17:23
推荐回答(1个)
回答1:

1.
data segment
buf db 1,2,3,4,5,6,7,8,9,0ah,0bh,0ch,0dh,0eh,0fh
data ends
code segment
assume cs:code,ds:data
start:
mov ax,data
mov ds,ax
lea si,buf
mov cx,16
next:
cmp si,2
jz jf1
cmp si,5
jz jf1
cmp si,9
jz jf1
cmp si,14
jz jf1
cmp si,15
jz jf1
shl byte ptr [si],1
jmp tj
jf1:
add byte ptr [si],3
tj:
inc si
loop next
mov ah,1
int 21h
mov ah,4ch
int 21h
code ends
end start

2.
data segment
f db 20 dup(?)
data ends
code segment
assume cs:code,ds:data
start:
mov ax,data
mov ds,ax
lea si,f
mov byte ptr [si],1
mov byte ptr [si+1],1
add si,2
mov cx,18
next:
mov al,[si-1]
add al,[si-2]
mov [si],al
inc si
loop next
mov ah,1
int 21h
mov ah,4ch
int 21h
code ends
end start
3.
code segment
assume cs:code
start:
mov ah,1
int 21h
mov cx,8
next:
rol al,1
mov dl,al
mov bl,al
and dl,1
add dl,30h
mov ah,2
int 21h
mov al,bl
loop next
mov ah,1
int 21h
mov ah,4ch
int 21h
code ends
end start

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