王爽汇编语言实验7

最近在学底层汇编做的一个练习，放上来纪念，感觉有点生硬，不过运行是没问题的。(王爽汇编语言p160)

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'

;年份(4字节)

dd 16,22,382,1356,2390,8000,1600,24486,50065,97479,140417,197514

dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5973000

;年收入(4字节)

dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226

dw 11542,11430,15257,17800

;员工人数(2字节)

data ends

table segment

db 21 dup ('year summ ne ?? ')

table ends

;-U 反汇编

;-T 2 执行跟踪

;-D DS:0 查看范围

;年份开始偏移地址为0000

;年收入开始偏移地址为0054

;员工人数开始偏移地址为00a8

;table位置分别是0000h,0005h,000ah,000dh

assume cs:code,ds:data,es:table

code segment

start :

mov ax,data

mov ds,ax

mov ax,table

mov es,ax

mov bx,0

mov di,0

mov si,0

mov cx,21

s:

;读取年份放到table

mov ax,ds:[di]

mov es:[bx],ax

mov ax,ds:[di+2]

mov es:[bx+2],ax

;读取员工数放到table

mov ax,ds:[00a8h+si]

mov es:[bx+000ah],ax

;读取收入放到table

mov ax,ds:[di+0054h]

mov es:[bx+5],ax

mov dx,ds:[di+0054h+2] ;高位字

mov es:[bx+5+2],dx

;总收入除以员工，得平均收入(ax为商，dx为余数)

div word ptr ds:[00a8h+si]

mov es:[bx+000dh],ax

add di,4h ;年份，收入下一行

add si,2h ;员工下一行

add bx,10h ;表格下一行

loop s

mov ax,4c00h

int 21h

code ends

end start

debug结果放在es寄存器，用d es:0查看