Basic Assembly Language Calculator

Write a program in Assembly Language that show a user menu as shown inFIG-01 and ask for user input if user press (a) A it performs addition (b) S it performs subtraction (c) E it performs EXIT (d) R it performs return to main menu

Code: .model small .stack 100h .data main_menu db "******* My Calculator *******",0dh,0ah db "Usman Institute of Technology",0dh,0ah db "*****************************",0dh,0ah db "* Enter A for Addition ",0dh,0ah db "* Enter S for Subtraction ",0dh,0ah db "* Enter E for Exit ",0dh,0ah db "* Enter R to return to menu",0dh,0ah,'$' MSG1 db 0dh,0ah,"Enter your Choice:",0dh,0ah,'$' MSG2 db 0dh,0ah,"Enter First number:",0dh,0ah,'$' MSG3 db 0dh,0ah,"Enter Second number:",0dh,0ah,'$' MSG4 db 0dh,0ah,'$' MSG5 db 0dh,0ah,"Your Result is:",0dh,0ah,'$' choice db ? no1 db ? no11 db ? no22 db ? no2 db ? result db ? .code Main proc mov ax,@data mov ds,ax Start: mov ah,09h mov dx,offset main_menu int 21h mov dx,offset MSG1 int 21h

mov ah,01h int 21h mov choice,al cmp choice,'A' JE addr cmp choice,'S' JE subtr cmp choice,'E' JE Ex cmp choice,'R' JE RE

addr: mov ah,09h mov dx,offset MSG2 int 21h mov ah,01h int 21h mov no1,al mov ah,09h mov dx,offset MSG3 int 21h mov ah,01h int 21h mov no2,al mov ah,09h mov dx,offset MSG4 int 21h mov dx,offset MSG5 int 21h mov al,no2 mov bl,no1 add al,bl aaa or ax,3030h mov ah,0eh int 10h mov ah,4ch int 21h

subtr: inpt: mov ah,09h mov dx,offset MSG2 int 21h mov ah,01h int 21h mov no11,al mov ah,09h mov dx,offset MSG3 int 21h mov ah,01h int 21h mov no22,al

mov ah,09h mov dx,offset MSG4 int 21h mov dx,offset MSG5 int 21h mov al,no11 mov bl,no22 cmp al,bl JNG inpt

sub al,bl aaa or ax,3030h mov ah,0eh int 10h mov ah,4ch int 21h EX: mov ah,4ch int 21h RE: jmp Start

mov ah,4ch int 21h Main endp end main

Output Screens: Addition:

Subtraction:

Return Main Menu:

Exit: