汇编程序成绩排序的实现

assume cs:cseg, ds:dseg, ss:sseg
sseg segment stack
  dw 100H dup (?)
sseg ends
dseg segment
  db 20
  db 98,61,57,82,89,73,61,58,53,54
  db 84,78,70,64,84,63,76,84,83,86
dseg ends
cseg segment
 start: mov ax, dseg
     mov ds, ax
     mov cl, ds:[0]
     mov ch, 0   ;cx中存储要排序数的个数
     mov bx, 1   ;要排序数的起始偏移地址
     call sort

     mov ax, 4c00h
     int  21h
;子程序名：sort
;功  能：对从(DS):(bx)开始的(cx)个字节排序
;入口参数：(DS):(BX)保存数据的起始地址
;    (cx)中是要排序的数据个数
;出口参数：无
sort proc
   ;这儿写子程序
sort endp

cseg ends
end start

assume cs:cseg, ds:dseg, ss:sseg
sseg segment stack
  dw 100H dup (?)
sseg ends
dseg segment
  db 20
  db 98,61,57,82,89,73,61,58,53,54
  db 84,78,70,64,84,63,76,84,83,86
dseg ends
cseg segment
 start: mov ax, dseg
     mov ds, ax
     mov cl, ds:[0]
   mov ch, 0   ;cx中存储要排序数的个数
   mov bx, 1   ;要排序数的起始偏移地址
   call sort

     mov ax, 4c00h
     int  21h

sort proc
     push si
     push ax
     dec cx   ;外层循环次数为数据个数减1
 c1:        ;排序的外层循环
     push cx   
     mov si, bx
 c2:        ;排序的内层循环
     mov al, [si]
     cmp al, [si+1]
     jbe noswap
     mov ah, [si+1]
   mov [si+1], al 
     mov [si], ah 
 noswap: inc si 
     loop c2 
     pop cx
     loop c1

   pop ax
   pop si
   ret
sort endp

cseg ends
end start