lizing

%include "io64.inc"

extern scanf
extern printf

section .rodata
    fstr db '%d', 0
    fstr1 db '%ll', 0

section .bss
    n resd 1

section .text
global CMAIN
CMAIN:
    mov ebp, esp
    and esp, -16
    sub esp, 8
    push n
    push fstr
    call scanf
    mov eax, 1
.loop:
    cmp dword [n], 0
    je .loop_end
    mul dword [n]
    dec dword [n]
    jmp .loop
.loop_end:
    ;mov dword [res], eax
    mov dword [esp + 8], edx
    mov dword [esp + 4], eax
    mov dword [esp], fstr1
    call printf
    mov esp, ebp
    xor eax, eax
    ret