花了大半天的时间，终于把这个作业给做了。
最初的版本大量使用了loop, 可以说是很低效，很小白了。
但一想到这是我目前写到的最复杂的一个汇编程序，还是选择记录下: P。
期待刷完整本后，再来看这段代码, 能被自己蠢哭。
代码实现
这个实验算是前面8章所学的一个小小总结了。
最初的版本；
assume cs:codesg, es:table, ss:stacksg
data segment
db '1975','1976','1977','1978','1979','1980','1981','1982'
db '1983','1984','1985','1986','1987','1988','1989','1990'
db '1991','1992','1993','1994','1995'
;stands for years from 1975 to 1995
dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000
;stands for yearly revenue from 1975 to 1995
dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226
dw 11542,14430,15257,17800
;stands for number of employees from 1975 to 1995
data ends
table segment
db 21 dup ('year summ ne ?? ')
table ends
stacksg segment
dw 8 dup (0)
stacksg ends
codesg segment
start: mov ax, data
mov ds, ax
mov bx, 0
mov bp,0
mov ax, table
mov es, ax
mov ax, stacksg
mov ss, ax
mov sp,0
mov cx, 21
s: push cx
mov si, 0
mov cx, 2
s0: mov ax, ds:[bp+si]
mov es:[bx+si], ax
add si,2
loop s0
pop cx
add bx, 16
add bp, 4
loop s
mov cx, 21
mov bx, 0
s1: push cx
mov si, 0
mov cx, 2
s2: mov ax, ds:[bp+si]
mov es:[bx+5+si], ax
mov ax, ds:[bp+si+2]
mov es:[bx+7+si], ax
add si, 2
loop s2
pop cx
add bx, 16
add bp, 4
loop s1
mov cx, 21
mov bx, 0
s3: mov ax, ds:[bp]
mov es:[bx+10], ax
add bx, 16
add bp, 2
loop s3
mov cx, 21
mov bx, 0
s4: mov ax, es:[bx+5]
mov dx, es:[bx+7]
div word ptr es:[bx+10]
mov es:[bx+13], ax
add bx, 16
loop s4
mov ax, 4c00h
int 21h
codesg ends
end start
看网上别人的解答，基本用21*4来偏移，两次循环搞定, 我起初也是这么想的，结果做的时候，发现脑子不够用，于是改用了最简单也最低效的方式，惭愧。
重新试着写了一轮，改进后的版本长这样：
assume cs:codesg, es:table, ss:stacksg
data segment
db '1975','1976','1977','1978','1979','1980','1981','1982'
db '1983','1984','1985','1986','1987','1988','1989','1990'
db '1991','1992','1993','1994','1995'
;stands for years from 1975 to 1995
dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000
;stands for yearly revenue from 1975 to 1995
dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226
dw 11542,14430,15257,17800
;stands for number of employees from 1975 to 1995
data ends
table segment
db 21 dup ('year summ ne ?? ')
table ends
stacksg segment
dw 8 dup (0)
stacksg ends
codesg segment
start: mov ax, data
mov ds, ax
mov bx, 0
mov bp, 0
mov di, 0
mov ax, table
mov es, ax
mov ax, stacksg
mov ss, ax
mov sp,0
mov cx, 21
s: push cx
mov si, 0
mov cx, 2
s0: mov ax, ds:[bp+si]
mov es:[bx+si], ax
mov ax, ds:[bp+21*4+si]
mov es:[bx+5+si], ax
add si,2
loop s0
mov ax, ds:[di+21*4+21*4]
mov es:[bx+10], ax
mov ax, es:[bx+5]
mov dx, es:[bx+7]
div word ptr es:[bx+10]
mov es:[bx+13], ax
pop cx
add bx, 16
add bp, 4
add di, 2
loop s
mov ax, 4c00h
int 21h
codesg ends
end start
果然虐过一遍，脑子清醒多了。