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1.extern "C"
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extern "C" _declspec(dllexport)int __stdcall JieCheng(int a)
{//½×³Ëº¯Êý¡£ÊäÈë:ÕýÕûÊý¡£Êä³ö:Õâ¸öÊýµÄ½×³ËÖµ
 int b=1;
 for(int i=1;i<=a;i++)
 {
  b=b*i;
 }
 return b;
}
extern "C" _declspec(dllexport)int _stdcall subs(int a,int b)
{//¼õ·¨º¯Êý
return a-b;
}
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static
 DataManager 
*
sharedDataManager 
=
 nil;
+
 (DataManager 
*
) sharedManager
{
    @synchronized(self)
 {
        
if
 (sharedDataManager 
==
 nil)
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