汇编语言 自然数求和程序

算法：
(（N+1）*N)/2

.386
include io32.inc
include kernel32.inc
includelib kernel32.lib
include msvcrt.inc
includelib msvcrt.lib
.data
num dword 234
sum dword ?
.code
start:
	mov eax,num
	add eax,1
	mul num
	shr edx,1
	rcr eax,1
	mov dword ptr sum,eax
	mov dword ptr sum+4,edx
	call dispuid
	exit 0
	end start