program to find the value of the foll. exp. (a+b)-(c+d) using 8086 compatible assembly language

ass2.asm

;program to find the value of the foll. exp. (a+b)-(c+d)
INCLUDE io.h

Cr EQU 0ah
Lf EQU 0dh


data SEGMENT
p_a DB cr, lf, 'Enter a: ',0
p_b DB lf, 'Enter b: ',0
p_c DB lf, 'Enter c: ',0
p_d DB lf, 'Enter d: ',0
p_res DB cr, lf, 'The result is: ',0
tmpstr DW 40 DUP (?)
data ENDS



code SEGMENT
	ASSUME cs:code, ds:data
start:	mov ax, data
	mov ds, ax
		;input a
	output p_a
	inputs tmpstr, 10
	atoi tmpstr
	mov dx, ax
		;input b
	output p_b
	inputs tmpstr, 10
	atoi tmpstr
	add dx, ax;(a+b)
		;input c
	output p_c
	inputs tmpstr, 10
	atoi tmpstr
	mov bx, ax
		;input d
	output p_d
	inputs tmpstr, 10
	atoi tmpstr
	add bx, ax;(c+d)
		;find and output result
	output p_res
	sub dx, bx;(a+b)-(c+d)
	mov ax, dx
	itoa tmpstr, ax
	output tmpstr

quit:	mov al, 00h
	mov ah, 4ch
	int 21h
code ENDS
END start