运行到div程序就退出,而且是正常退出,求助
本帖最后由 396449673 于 2019-8-18 20:24 编辑这是小甲鱼视频中间那个公司的工程,运行到div那一行程序就-----------正常地退出。。。。这是为什么
http://i2.tiimg.com/697342/d03ae8b0eb556d6b.png
assume cs:codesg
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'
dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000
dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226
dw 11542,14430,15257,17800
data ends
table segment
db 21 dup('year summ ne ?? ')
table ends
codesg segment
start:
mov ax,data
mov ds,ax
mov ax,table
mov es,ax
mov bx,0
mov si,0
mov cx,21
s:
mov di,0
mov ax,
mov word ptr es:,ax
mov ax,2h
mov word ptr es:2h,ax
add di,5
mov ax,54h
mov word ptr es:,ax
mov ax,56h
mov word ptr es:2h,ax
add di,2
mov ax,
mov word ptr es:,ax
add di,2
mov ax,54h
mov dx,56
div word ptr ds:
mov es:,ax
add si,4
add bx,16
loop s
mov ax,4c00h
int 21h
codesg ends
end start 本帖最后由 396449673 于 2019-8-18 20:47 编辑
那个56少写了一个h,加上之后前3个循环对了,第四个循环就又正常退出了 本帖最后由 jackz007 于 2019-8-18 20:55 编辑
通过楼主贴出的图片可以看到相关的存储器和存储单元:DX = 3931,AX = 0010,WORD PTR DS: = 0300
就是说,执行的除法是
39310010H div 300H = 131055H
显然,这个商太大,已经远远超出了一个 16 位寄存器(AX)所能储存的数值范围,所以才会溢出。 本帖最后由 jackz007 于 2019-8-18 21:49 编辑
试试我修改的代码吧
data segment para public 'DATA'
db '1975','1976','1977','1978','1979','1980','1981','1982','1983'
db '1984','1985','1986','1987','1988','1989','1990','1991','1992'
db '1993','1994','1995'
dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000
dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226
dw 11542,14430,15257,17800
data ends
table segment
db 21 dup('year summ ne ?? ')
table ends
stack segment stack
dw 800h dup(00)
stack ends
code segment
assume cs:code,ds:data,es:table
main proc far
mov ax,data
mov ds,ax
mov ax,table
mov es,ax
xor bx,bx
xor si,si
mov cx,21
cld
m1: push cx
mov di,bx
mov cx,4
rep movsb
add bx,16
pop cx
loop m1
mov bx,5
mov cx,21
m2: mov di,bx
movsw
movsw
add bx,16
loop m2
mov bx,10
mov cx,21
m3: mov di,bx
movsw
add bx,16
loop m3
mov bx,5
mov cx,21
m4: mov ax,word ptr es:
mov dx,word ptr es:
div word ptr es:
mov word ptr es:,ax
add bx,16
loop m4
mov ax,4c00h
int 21h
main endp
code ends
end main
jackz007 发表于 2019-8-18 21:26
试试我修改的代码吧
{:5_100:}你的可以{:5_109:},movsw我还没学到{:5_108:}很6,了解一下思路,然后现在我去看看我的是不是写错位置了 已经找到问题,将si和bx用混了,还有将0A8H写成了0A7H
assume cs:codesg
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'
dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000
dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226
dw 11542,14430,15257,17800
data ends
table segment
db 21 dup('year summ ne ?? ')
table ends
codesg segment
start:
mov ax,data
mov ds,ax
mov ax,table
mov es,ax
mov bx,0
mov si,0
mov cx,21
s:
mov di,0
mov ax,
mov word ptr es:,ax
mov ax,2h
mov word ptr es:2h,ax
add di,5
mov ax,54h
mov word ptr es:,ax
mov ax,56h
mov word ptr es:2h,ax
add di,2
mov ax,
mov word ptr es:,ax
add di,2
mov ax,54h
mov dx,56h
div word ptr ds:
mov es:,ax
add si,4
add bx,16
loop s
mov ax,4c00h
int 21h
codesg ends
end start 问题没有完全解决,现在的数据还是不准确的,明早在排查 这是昨晚修改的代码,已完全正确
assume cs:codesg
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'
dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000
dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226
dw 11542,14430,15257,17800
data ends
table segment
db 21 dup('year summ ne ?? ')
table ends
codesg segment
start:
mov ax,data
mov ds,ax
mov ax,table
mov es,ax
mov bx,0
mov si,0
mov cx,21
s:
mov di,0
mov ax,
mov word ptr es:,ax
mov ax,2h
mov word ptr es:2h,ax
add di,5
mov ax,54h
mov word ptr es:,ax
mov ax,56h
mov word ptr es:2h,ax
add di,5
mov dx,0
mov ax,si
mov ds:,ax
mov ds:,2
div word ptr ds:
mov si,ax
mov ax,
mov word ptr es:,ax
mov ax,ds:
mov si,ax
add di,3
mov ax,54h
mov dx,56h
div word ptr es:
mov es:,ax
add si,4
add bx,16
loop s
mov ax,4c00h
int 21h
codesg ends
end start
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