section .data
msg1 db "Enter two number",10
len1 equ $-msg1
msg2 db "Addition is....",10
len2 equ $-msg2

section .bss
a resb 1
b resb 1
c resb 1

section .text
global _start
_start:
mov rax,01H
mov rdi,01H
mov rsi,msg1
mov rdx,len1
syscall

mov rax,00H
mov rdi,00H
mov rsi,a
mov rdx,01
syscall
sub byte[a],30H

mov rax,00H
mov rdi,00H
mov rsi,b
mov rdx,01
syscall
sub byte[b],30H

mov bl,byte[a]
add bl,byte[b]
mov byte[c],bl

mov rax,01H
mov rdi,01H
mov rsi,msg2
mov rdx,len2
syscall

add byte[c],30H
mov rax,01H
mov rdi,01H
mov rsi,c
mov rdx,01
syscall

mov rax,60
mov rdi,00H
syscall