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Program to compare two strings

Posted By: Ludwik Fischer     Category: Assembly Language     Views: 13916

Write a Program to compare two strings.

Code for Program to compare two strings in Assembly Language

Data Segment
  str1 db 'GLSICT','$'  
  strlen1 db $-str1
  str2 db 'GLSICT','$'
  strlen2 db $-str2
  streq db 'Strings are Equal','$'
  struneq db 'Strings are Unequal','$'
Data Ends

Code Segment
  Assume cs:code, ds:data
    mov ax, data
    mov ds, ax
    mov es, ax
    lea si, str1   
    lea di, str2
    mov cx, 6
    mov al, strlen1
    mov bl, strlen2
    cmp al, bl
    jne Not_Equal

    repe cmpsb
    jne Not_Equal
    jmp Equal

       mov ah, 09h
       lea dx, struneq
       int 21h
       jmp Exit
       mov ah, 09h
       lea dx, streq
       int 21h
       mov ax, 4c00h
       int 21h
Code Ends
End Begin


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Ludwik Fischer
Ludwik Fischer author of Program to compare two strings is from Frankfurt, Germany.
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