C++單例模型的例子

#include <iostream> 
#include <new> 
using namespace std; 
 
class CGlobalInstance 
{ 
  private: 
       CGlobalInstance(); 
       virtual ~CGlobalInstance(); 
       static CGlobalInstance* m_this; 
  public:   
   static CGlobalInstance* get_instance(); 
   void out(); 
}; 
 
 
CGlobalInstance::CGlobalInstance() 
{ 
 
} 
 
 
CGlobalInstance::~CGlobalInstance() 
{ 
 
} 
 
void CGlobalInstance::out() 
{ 
    cout<<"hi man"<<endl; 
} 
 
CGlobalInstance* CGlobalInstance::get_instance() 
{ 
   if (NULL == m_this) 
   { 
     m_this = new CGlobalInstance(); 
   } 
   return m_this; 
} 
 
CGlobalInstance* CGlobalInstance::m_this = NULL; 
 
int main(void) 
{ 
  CGlobalInstance::get_instance()->out(); 
} 

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