;Bai 2: Tinh tong tu 1 den n.

%include "io.inc"
extern _printf
extern _getch
section .data
    tb1 db "Tinh tong tu 1 den n.",10,0
    tb2 db "Nhap n: ",0
    fmt db "%d",0
    fmt1 db "S = %d",0

section .bss
    a resd 1
    b resd 1
    c resd 1

section .text
global CMAIN
CMAIN:
    ;xuat tb1
    push tb1
    call _printf
    add esp,4

    ;nhap n
    push a
    push fmt
    call _scanf
    add esp,8

    ;goi ham
    je TinhTong

    ;Lay ket qua
    mov ebx,[b]

    ;xuat ket qua
    push dword [b]
    push fmt1
    call _printf
    add esp,8

    ;Ket thuc
    call _getch
    xor eax,eax
    ret

TinhTong:
    xor
    mov eax,[a]