section .data
  welcome: db 'Welcome, This app will add any number you enter to 10' ,0xa ; welcome message
  welcomeLen equ $- welcome ;establishes welcome length
  prompt: db 'Please enter a number:',0xa
  promptlen equ $- prompt
  Userinput: db 'You entered :',
  UserinputLen equ $- Userinput ;establishes user inout length
  Resultmsg: db 0xa,'The result is:',0xa
  ResultmsgLen equ $- Resultmsg ;establishes result length
  two db '2'

section .bss
  Usernum resb 1 ; Variable used to store user number input/ 5 bytes reserved for input
  sum resb 1     ; Varibale used to store sum of 10 and user input
section .text
	global _start

_start:
  ;Display welcome message
  mov eax,4          ;syscall for write
  mov ebx,1          ; stdout/ establishes that the machine will perform output
  mov ecx,welcome    ; stores the actual message in ecx register
  mov edx,welcomeLen ;stores length of message in register edx
  int 80h            ; calls kernel/ essentally tells machine to execute the above code
  
  ;user prompt to enter a number
  mov eax,4         ;syscall for write
  mov ebx,1         ; stdout/ establishes that the machine will perform output
  mov ecx,prompt    ; stores the actual message in ecx register
  mov edx,promptlen ;stores length of message in register edx
  int 80h           ; calls kernel/ essentally tells machine to execute the above code
  
  
  ;Read store user input
  mov eax,3       ; syscall for system read
  mov ebx,0       ; stdin/ establishes that machine is recieving input
  mov ecx,Usernum ; stores userinput into variable established earlier in .bss section
  mov edx,5       ; lenght of input will be same as reserved number of bytes/ resb in this case is 5
  int 80h
   
  ;print 'you entered':
  mov eax,4           ;syscall for write
  mov ebx,1           ; stdout/ establishes that the machine will perform output
  mov ecx,Userinput   ; stores the actual message in ecx register
  mov edx,UserinputLen;stores length of message in register edx
  int 80h             ; calls kernel/ essentally tells machine to execute the above code

  ; print user input
  mov eax,4
  mov ebx,1
  mov ecx,Usernum
  mov edx,5
  int 80h
  
  ;perform addition of 10 to user input
  mov eax, [two] ;stores value inside variable to in register eax
  sub eax, '0'   ; converts ascii to decimal
  mov ebx, [Usernum] ; store user value in ebx register
  sub ebx, '0'   ; converts ascii to decimal
  add eax,ebx    ; adds value in eax and ebx , stores result in eax register
  add eax, '0'   ; converts result in eax from decimal to ascii
  mov [sum],eax  ; places sum in eax to sum variable
  int 80h 
  
  ; print 'result is'
  mov eax,4           ;syscall for write
  mov ebx,1           ; stdout/ establishes that the machine will perform output
  mov ecx,Resultmsg  ; stores the actual message in ecx register
  mov edx,ResultmsgLen;stores length of message in register edx
  int 80h  
  
  ;print result of additon
  mov eax,4           ;syscall for write
  mov ebx,1           ; stdout/ establishes that the machine will perform output
  mov ecx,sum        ; stores the actual message in ecx register
  mov edx,1           ;stores length of message in register edx
  int 80h             ; calls kernel/ essentally tells machine to execute the above code

  
  
  ;Close out program
  mov eax,1 ;system call for sys exit
  mov ebx,0 ;
  int 80h