ADDITION AND SUBTRACTION IN ASSEMBL

.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: $'
MSG4 DB 10,13, 'ENTER SUBTRACTION NUMBER: $'
MSG5 DB 10,13, 'SUBTRACTION 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

 ADD BL,CL

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


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


;message4
LEA DX,MSG4
MOV AH,9
INT 21H

;INPUT 3
MOV AH,1
INT 21H
MOV CL,AL

;message 5
LEA DX,MSG5
MOV AH,9
INT 21H


SUB BL,CL

;OUTPUT OF SUBTRACT
MOV AH,2
ADD BL,48
MOV DL,BL
INT 21H

 MOV AH,4CH
 INT 21H

MAIN ENDP
END MAIN