[Dev-C++] gas again

[<cg...@wo...>]

  Well, I'll need to work it out from zero myself (but after learning=20
NASM). I want only one question I cannot solve, and if it gets assembled=20
without errors I don't know if it because it is done right or not, in=20
fact I get run-time errors.
It's about variable declaration and initialization:

The current code which is assembled but doesn't run is:

.data
mensaje1: .ascii "Introduzca un n=FAmero\n\0"
mensaje2: .ascii "El doble es: \0"
string: .ascii "%d\n\0"
numer: .long 200

.bss
.comm entero, 4


.text
.global _asm_main
.extern _printf
.extern scanf
_asm_main:
enter    $0, $0
pusha

movl    (mensaje1),    %eax
push    %eax
call    _printf
addl    $12,    %esp

movl    numer,    %eax
push    %eax
push    (string)
call    _printf
addl    $16,    %esp

push    (entero)
push    (string)
call    _scanf
movl    %eax,    (entero)
addl    $16,    %esp

movl    entero,    %eax
addl    %eax,    %eax
movl    %eax,    %ebx

movl    (mensaje2),    %eax
push    %eax
call    _printf
addl    $12,    %esp

movl    %ebx,    %eax
push    %eax
push    (string)
call    _printf
addl    $16, %ebp

popa
movl    $0,    %eax
leave
ret

Can someone make these pieces of code be correctly written? If so many=20
thanks, if not, thanks anyway.
Have a nice day, all of you.