518.asm

本书为清华大学第二版汇编语言的课后题详解

;518.asm

        .model small
        .data
grade   dw 98,61,62,63,68,67,64,65,66,69
        dw 71,72,73,76,75,78,79,70,74,76
        dw 80,90,88,99,87,86,84,80,90,92
rank    dw 30 dup(?)
        .stack 100h
        .code
main    proc  far
start:
        push  ds
        sub   ax,ax
        push  ax
        mov   ax,@data
        mov   ds,ax
        mov   cx,30
        mov   si,0
loop1:  mov   ax,grade[si]
        push  cx
        mov   cx,30
        mov   di,0
        mov   bx,1
loop2:  cmp   grade[di],ax
        jng   next
        inc   bx
next:   add   di,2
        loop  loop2
        mov   rank[si],bx
        pop   cx
        add   si,2
        loop  loop1
        ret
main    endp
        end   start