mi exp1re

INCLUDE io.h

cr EQU 0dh
lf EQU 0ah

data SEGMENT
x DB ?
y DB ?
a DB ?
b DB ?
res DW ?
prompt1 DB 'enter the value of x',0
prompt2 DB 'enter the value of y',0
prompt3 DB 'enter the value of a',0
prompt4 DB 'enter the value of b',0
string DB 40 DUP(?)
lab DB cr,lf,'the result is'
sum DB 6 DUP(?)
    DB cr,lf,0

data ends

code SEGMENT
ASSUME cs:code,ds:data

start:MOV AX,SEG data
      MOV DS,Ax

prompt: output prompt1
        inputs string,40
        atoi string
        MOV x,AL

    output prompt2
        inputs string,40
        atoi string
        MOV y,AL

    output prompt3
        inputs string,40
        atoi string
        MOV a,AL

    output prompt4
        inputs string,40
        atoi string
        MOV b,AL

    MOV AL,x
    ADD AL,y
    MOV BL,a
    SUB BL,b

    MOV CL,a
    ADD CL,b
    MOV DL,x
    SUB DL,y

    MUL BL
    MOV BX,AX
    MOV AL,CL
    MUL DL

    MOV CX,AX
    MOV DX,0
    MOV AX,BX
    CWD
    DIV CX
    itoa sum,AX
    output lab

quit: MOV AL,0
      MOV AH,4ch
      int 21h
code ends

END start