王爽.汇编.第三版.实验七.答案

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

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'  
    ;以上是21年的21个字符串

    dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514          
    dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000  
    ;以上是21个表示年收入的字符串

    dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226         
    dw 11542,14430,45257,17800  
    ;以上是21个雇佣人数
data ends    

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

code segment

start:

    mov ax,data
    mov es,ax   ; 信息来源

    mov ax,table
    mov ds,ax   ; 信息目的地

    mov cx,21

    mov si,0    ;年份的索引（0-21*4）
    mov di,0    ;收入 
    mov bp,0    ;人数
    mov bx,0    ;结果索引
    computerincome:

        push cx

            ;year
            mov al, es:[si]
            mov ds:[bx],al
            mov al,es:[si+1]
            mov ds:[bx+1],al
            mov al,es:[si+2]
            mov ds:[bx+2],al
            mov al,es:[si+3]
            mov ds:[bx+3],al

            ;income, ready for div, set ax = so low word
            mov ax,es:[di+84]
            mov ds:[bx+5], ax
            ;ready for div, set dx = so high word
            mov dx,es:[di+86]
            mov ds:[bx+7], dx

            ;ne,ready for div, set cx = ne
            mov cx,es:[bp+168]
            mov ds:[bx+0ah], cx

            ;avrage
div cx
            mov ds:[bx+0dh],ax

        pop cx

add si, 4
add di, 4
add bp, 2
add bx, 010h
        loop computerincome
    mov ax, 4c00h
    int 21h

code ends

end start