WIN32汇编里如何把浮点数输出？

Question

到网上找到的解答说用msvcrt.dll里的sprintf函数，可是我试了一下发现数据总是0.000000
下面是源码：
.386
.model flat,stdcall
option casemap:none
include windows.inc
include user32.inc
includelib user32.lib
include kernel32.inc
includelib kernel32.lib
include msvcrt.inc
includelib msvcrt.lib
_procvar typedef proto C :dword,:VARARG
procvar typedef ptr _procvar
.data
szshowvalue db 'the div result is %f',0
szdllname db 'msvcrt.dll',0
szsprintf db 'sprintf',0
.data?
dwbuf dd ?
hdllinstance dd ?
_wsprintf procvar ?
.code
main proc
local @szbuf[100h]:byte
invoke RtlZeroMemory,addr @szbuf,100h
mov dwbuf,255 ;//测试数据
fild dwbuf
mov dwbuf,4096 ;//测试数据
fild dwbuf
fdivp st(1),st

fstp dwbuf
invoke LoadLibrary,offset szdllname
.if !eax
ret
.else
mov hdllinstance,eax
.endif
invoke GetProcAddress,hdllinstance,offset szsprintf
mov _wsprintf,eax
invoke _wsprintf,addr @szbuf,offset szshowvalue,dwbuf
invoke MessageBox,NULL,addr @szbuf,NULL,MB_OK
ret
main endp
start:
call main
invoke ExitProcess,NULL
end start
我是哪儿搞错了？

Answer 1

http://bbs.csdn.net/topics/90508689