Printing values in array

Question

I am trying to print the first value in the array I declared:

global _main
extern _printf

section .data
array db "1","2","3","4","5","6","7","8","9"    

fmt db "%d",0

section .text
_main:

    push ebp
    mov ebp, esp

    mov ebx, array
    mov eax, [ebx]
    push eax
    push fmt
    call _printf
    add esp, 4
    pop eax

    mov esp, ebp
    pop ebp

    ret

However, the output isn't 1, it's some really large number. I thought by putting quotes around each integer, I would be printing the symbol, not the equivalent ASCII.

score 1 · Accepted Answer · 2014-03-04 21:10:25Z

1

You use db, which means define byte, single character while you seem to expect an integer in the format, %d.

You should use dd instead and remove the quotes:

array dd 1, 2, 3, 4, 5, 6, 7, 8, 9
fmt db "%d", 0

or use %c if you want to print a char:

array dd "1","2","3","4","5","6","7","8","9"
fmt db "%c", 0

plus, here:

add esp, 4

should be:

add esp, 8

you pushed two arguments.

edited Mar 4, 2014 at 21:10

answered Mar 4, 2014 at 20:26

user1129665

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