Hi all,

I need to read in 10 2-digit numbers from the user and then output the numbers along with the average.

I am able to read in the numbers one by one, the problem is I have no idea how to build a list to hold all of the 10 digits in one spot.

I am still very new and I do not understand a lot of things so everytime I read in from the user, the digit is placed into what I called 'buffer' and I defined this in the .bss section as:

buffer resb 1

after that I am trying to build a list with these numbers so I am trying to do:

mov [list+esi], buffer

where I defined list in .bss as

list resb 10

and I keep getting the error: operation size not specified at the line "mov [list+esi], buffer"

I am really lost as to how to build this list and also the sizes that I am supposed to be specifying and indexing by. Any help would be appreciated.

Thanks!

segment .data
        msg db 'Enter a digit from 10 to 99: #'
        len equ $-msg

segment .bss
        buffer: resb 1
        list: resb 10
segment .text
        global _start
_start:
        mov esi, 0
        mov ecx, 10

read:   mov eax, 4
        mov ebx, 1
        mov edi, ecx
        mov ecx, msg
        mov edx, len
        int 0x80

        mov eax, 3
        mov ebx, 0
        mov ecx, buffer
        int 0x80
        mov [list+esi], buffer  <-- Error
        add edi, 1
        mov ecx, edi
        loop read

        mov eax, 4
        mov ecx, 1
        mov ecx, list
        mov edx, 20
        int 0x80

exit:   mov eax, 1
        int 0x80

I think the problem may be in the CPU inability to move memory to another memory in one instruction - you need to use TWO instructions: 1st: move buffer into a register and then move that register into other memory - your list declared with 'resb 10':

mov al, buffer
mov [ebx+esi], al

I assume that 'resb' means REServe Byte. So, all your numbers are bytes. When you need an average - you need to add 10 numbers. This SUM can easily overflow a BYTE (which can hold max value of 255). So, when you adding the numbers you need to use a bigger register, like EAX, but then to load BYTE into EAX you need to use MOVZX instruction, something like this:

movzx eax, byte ptr [ebx+esi]

Thanks for the help! I don't get the error anymore but when I try and print out my list, nothing is being printed.

        mov ebp, buffer
        mov [list+esi], ebp
        add esi, 1
        mov ecx, edi
        loop read

        mov eax, 4
        mov ecx, 1
        mov ecx, list
        mov edx, 20
        int 0x80

exit:   mov eax, 1
        int 0x80

I tried just printing out one part of the list such as [list] but nothing is printing out.