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Program to Open an Existing file write into it and close it

Posted By: Shannon Hughes     Category: Assembly Language     Views: 6487

Write a Program to Open an Existing file write into it and close it.

Code for Program to Open an Existing file write into it and close it in Assembly Language

prnstr macro msg
    mov ah, 09h
    lea dx, msg
    int 21h
    endm

data segment
    ans db "asdf1234h$"
        buf1 db "c:\temp\abc.txt", 00h
    buf2 db 0ah, "File not found...$"
    buf3 db 0ah, "File opened successfully...$"
    buf5 db 0ah, "Error closing file..$"
    buf6 db 0dh, 0ah, "File closed successfully...$"
data ends

code segment
    assume cs:code, ds:data
start :
    mov ax, data
    mov ds, ax
    mov es, ax

    lea dx, buf1
    mov ah, 3dh
    mov al, 02h     ; open in write mode
    int 21h

    jnc stop
    prnstr buf2
    jmp last
stop :

    mov bx, ax
    prnstr buf3

    mov ah,40h
    mov cx,000ah
    lea dx,ans
    int 21h
        


    mov ah, 3eh
    int 21h

        
    jnc success
    prnstr buf5
    jmp last
success :
        prnstr buf6
last :
        mov ax, 4c00h
        int 21h
code ends
    end start
  
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Shannon Hughes
Shannon Hughes author of Program to Open an Existing file write into it and close it is from London, United Kingdom.
 
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