汇编程序设计

编程实现：输入字符串（最大串长自定），使用冒泡排序法进行排序，在屏幕上显示排序后的字符串

assume cs:code, ds:datas

datas segment
str db 100 dup(?)
datas ends

code segment
start:
mov ax, datas
mov ds, ax

lea bx, str
xor cx, cx
mov ah, 1
next:
int 21h
cmp al, 13
jz ok
mov [bx], al
inc bx
inc cx
jmp next
ok:
mov al, '$'
mov [bx], al
mov ah, 2
mov dl, 13
int 21h
mov dl, 10
int 21h

mov di, cx
xor cx, cx
jmp cp1
upd1:
inc cx
cp1:
cmp cx, di
jz done
mov si, di
upd2:
dec si
cp2:
cmp si, cx
jle ok1
mov al, [si]
cmp al, [si-1]
jge noop
xchg al, [si-1]
mov [si], al
noop:
jmp upd2
ok1:
jmp upd1
done:
lea dx, str
mov ah, 9
int 21h
mov ax, 4c00h
int 21h
code ends
end start