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Assembly Program to get a String from user and Store it

January 16, 2020

This program uses string instructions to get a string from the user and store it in the memory. After storing this program simply prints the stored string entered by the user.

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.MODEL SMALL
.STACK 100H
.DATA
MSG1 DB "ENTER A STRING: $"
MSG2 DB 0DH, 0AH, "YOU ENTERED: $"
STRING DB 100 DUP(?)     
.CODE
MAIN PROC
    
     MOV AX, @DATA
     MOV DS, AX
     MOV ES, AX
     
     MOV AH, 9
     LEA DX, MSG1
     INT 21H
     
     LEA DI, STRING
 
     MOV AH, 1
     READ:
     INT 21H
     CMP AL, 0DH
     JE ENDOFSTRING
     STOSB
     JMP READ
     
     ENDOFSTRING:
     MOV AL, "$"
     STOSB
     
     MOV AH, 9
     LEA DX, MSG2
     INT 21H
     
     MOV AH, 9
     LEA DX, STRING
     INT 21H
     
    MAIN ENDP
END MAIN

Output: 

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