SUBTRACTION TWO NUMBER IN ASSEMBLY

.MODEL SMALL
.STACK 100H

.DATA
MSG1 DB 10,13, 'ENTER FIRST NUMBER: $'
MSG2 DB 10,13, 'ENTER SECOND NUMBER: $'
MSG3 DB 10,13, 'ADDITION RESULT IS: $'

.CODE
MAIN PROC
 ;initialize data segment
MOV AX,@DATA
MOV DS,AX

 ;message  1
LEA DX,MSG1
MOV AH,9
INT 21H

 ;input   1
MOV AH,1
INT 21H
MOV BL,AL

 ;message  2
LEA DX,MSG2
MOV AH,9
INT 21H

 ;input 2
MOV AH,1
INT 21H
MOV CL,AL

 SUB BL,CL

;message3
LEA DX,MSG3
MOV AH,9
INT 21H

  ;output
MOV AH,2
ADD BL,48
MOV DL,BL
INT 21H



MAIN ENDP
END MAIN