Assembly 在程序集中的文本文件末尾追加
我这里有一个TASM代码，当我再次运行程序时，它不会附加新字符串。我要感谢你帮助我达到这个“状态”。Assembly 在程序集中的文本文件末尾追加,assembly,file-io,append,tasm,dosbox,Assembly,File Io,Append,Tasm,Dosbox,我这里有一个TASM代码，当我再次运行程序时，它不会附加新字符串。我要感谢你帮助我达到这个“状态”。 如果我使用3Ch，程序可以工作，但不会附加到文件末尾。通过使用6Ch而不是3Ch，表示它不会将现有文件截断为零字节，但每当我运行代码时，创建文件时就会出现错误（未创建任何文件）。请帮我修改代码。多谢各位 编辑2: ; This example program creates a file and then writes to it. .model small .stack .data CR
如果我使用
3Ch6Ch3Ch编辑2:
; This example program creates a file and then writes to it.
.model small
.stack
.data
CR equ 13
LF equ 10
StartMessage DB "This program creates a file called NEW.TXT"
DB ,"on the C drive.$"
EndMessage DB CR,LF,"File create OK, look at file to"
DB ,"be sure.$"
WriteMessage DB "An error has occurred (WRITING)$"
OpenMessage DB "An error has occurred (OPENING)$"
CreateMessage DB "An error has occurred (CREATING)$"
WriteMe DB "HELLO, THIS IS A TEST, HAS IT WORKED?",0
FileName DB "new3.txt",0 ; name of file to open
Handle DW ? ; to store file handle
.code
START:
mov ax,@data ; base address of data segment
mov ds,ax ; put it in ds
mov dx,offset StartMessage
mov ah,09h
int 21h
mov si, offset FileName ; put offset of filename in dx
xor cx,cx ; clear cx - make ordinary file
mov ah,6Ch ; function 3Ch - create a file
mov bx, 3
mov dx, 12h
int 21h ; call DOS service
jc CreateError ; jump if there is an error
mov ah,3Eh ; function 3Eh - close a file
int 21h ; call dos service
mov dx, offset FileName ; put offset of filename in dx
mov al,2 ; access mode -read and write
mov ah,3Dh ; function 3Dh - open the file
int 21h ; call dos service
jc OpenError ; jump if there is an error
mov Handle,ax ; save value of handle
mov bx, Handle
xor cx, cx
xor dx, dx
mov ah, 42h
mov al, 02h
int 21h
mov dx,offset WriteMe ; address of information to write
mov bx,Handle ; file handle for file
mov cx,38 ; 38 bytes to be written
mov ah,40h ; function 40h - write to file
int 21h ; call dos service
jc WriteError ; jump if there is an error
cmp ax,cx ; was all the data written?
jne WriteError ; no it wasn't - error!
mov bx,Handle ; put file handle in bx
mov ah,3Eh ; function 3Eh - close a file
int 21h ; call dos service
mov dx,offset EndMessage
mov ah,09h
int 21h
ReturnToDOS:
mov ax,4C00h ; terminate program
int 21h
WriteError:
mov dx,offset WriteMessage
jmp EndError
OpenError:
mov dx,offset OpenMessage
jmp EndError
CreateError:
mov dx,offset CreateMessage
EndError:
mov ah,09h
int 21h
mov ax,4C01h
int 21h
END START
mov dx,offset FileName ; put offset of filename in dx
xor cx,cx ; clear cx - make ordinary file
mov ah,6Ch ; function 3Ch - create a file
mov al, 0
int 21h ; call DOS service
mov bx, Handle
xor cx, cx
xor dx, dx
mov ah, 42h
mov al, 02h
int 21h
sidxbxdxmov dx,offset FileName ; put offset of filename in dx
xor cx,cx ; clear cx - make ordinary file
mov ah,6Ch ; function 3Ch - create a file
mov al, 0
int 21h ; call DOS service
mov bx, Handle
xor cx, cx
xor dx, dx
mov ah, 42h
mov al, 02h
int 21h
句柄mov dx,offset FileName ; put offset of filename in dx
mov al,2 ; access mode -read and write
mov ah,3Dh ; function 3Dh - open the file
int 21h ; call dos service
mov dx,offset FileName ; put offset of filename in dx
xor cx,cx ; clear cx - make ordinary file
mov ah,6Ch ; function 3Ch - create a file
mov al, 0
int 21h ; call DOS service
mov bx, Handle
xor cx, cx
xor dx, dx
mov ah, 42h
mov al, 02h
int 21h
sidxbxdxmov dx,offset FileName ; put offset of filename in dx
xor cx,cx ; clear cx - make ordinary file
mov ah,6Ch ; function 3Ch - create a file
mov al, 0
int 21h ; call DOS service
mov bx, Handle
xor cx, cx
xor dx, dx
mov ah, 42h
mov al, 02h
int 21h
句柄mov dx,offset FileName ; put offset of filename in dx
mov al,2 ; access mode -read and write
mov ah,3Dh ; function 3Dh - open the file
int 21h ; call dos service
您正在尝试再次打开打开的文件。你需要先把它关上再打开。或者，如果你有句柄，就继续处理文件，不要关闭然后重新打开它。谢谢你，但老实说，我没那么了解它。我现在将BX设置为2（读/写访问模式），DX设置为3（文件存在行为）（）我将
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