菜鸟求助高手 帮解答~~

3. SCORE缓冲区中有10个无符号WORD数，求它们的平均值，送
入AVERAGE字单元

xor si,si
mov cx,10
xor ax,ax
xor dx,dx
Addition:
add ax,SCORE[si]
adc dx,0
inc si
inc si
loop Addition
mov cx,10
div cx
mov AVERAGE,ax

第一题：
Data segment
ARRAY db 12,35,100,03,200,66,75,65,124,180
UP db 00h
DOWN db 00h
Data ends
Code segment
assume cs:Code,ds:Data
Start:
mov ax,Data
mov ds,ax

mov si,offset ARRAY;偏移地址送给si
mov cx,10
next:mov bl,[si]
cmp bl,42h
jz Jump_loop
ja a001
inc DOWN
jmp Jump_loop
a001:inc UP
Jump_loop:inc si
loop next

mov ah,01h
int 16h
mov ah,4ch
int 21h
Code ends
end Start

第二题：
Data segment
ARRAY dw 0012h,35h,100h,03h,200h,66h,75h,65h

Data ends
Code segment
assume cs:Code,ds:Data
Start:
mov ax,Data
mov ds,ax
mov si,offset ARRAY
mov cx,8
next:add word ptr [si],1
inc si
inc si
loop next

mov ah,01h
int 16h
mov ah,4ch
int 21h
Code ends
end Start

第三题：

Data segment
SCORE dw 0012h,35h,100h,03h,200h,66h,75h,65h,3204h,1200h
AVERAGE dw ?
Data ends
Code segment
assume cs:Code,ds:Data
Start:
mov ax,Data
mov ds,ax
mov si,offset SCORE
mov cx,10
xor ax,ax
xor dx,dx
next:add ax,[si]
adc dx,0
inc si
inc si
loop next
mov bx,10
div bx
mov AVERAGE,ax

mov ah,01h
int 16h
mov ah,4ch
int 21h
Code ends
end Start

第四题：
Code segment
assume cs:Code
Start:
mov ax,Data
mov ds,ax
xor bx,bx
sub cx,cx
call sum
mov ax,cx

mov ah,4ch
int 21h

sum proc
inc bx
cmp bx,50
ja a001
add cx,bx
call sum
a001: ret
sum endp
Code ends
end Start