【汇编语言(第3版)王爽】试验7 寻址方式在接过话数据访问中的应用(代码+注释)

时间:2021-09-18 01:20:20
assume cs:codesg, es:table , ds:data

data segment
db '1975','1976','1977','1978','1979','1980','1981','1982','1983'
db '1984','1985','1986','1987','1988','1989','1990','1991','1992'
db '1993','1994','1995'
;21个年份
dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000
;21个被除数
dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226
dw 11542,14430,15257,17800
;21个除数
data ends

table segment
db 21 dup ('year summ ne ?? ')
table ends

codesg segment
start:
;将data段与ds关联
mov ax,data
mov ds,ax
;将table段与es关联
mov ax,table
mov es,ax
;用bx定位到被除数
mov bx,84
;用di定位到table
mov di,0


mov cx,21
s: ;将data中的日期复制到table中的year
mov ax,ds:[bx-84]
mov es:[di],ax
mov ax,ds:[bx-82]
mov es:[di+2],ax
;被除数
mov ax,ds:[bx]
mov dx,ds:[bx+2]
;除法,除完之后商存在ax中
div word ptr ds:[bx+84]
;将商复制到table中??处
mov es:[di+13],ax
;一个双字是4字节
add bx,4
;table中一行是16字节
add di,16
loop s

mov ah,4ch
int 21

codesg ends
end start