single.h

1 #ifndef _SIGNAL_H_ 2 #define _SIGNAL_H_ 3 template
     
       4  5 class Single 6 { 7 public: 8         static TYPE* getInstance(void); 9         static void destroy(void);10 protected:11         Single(void)12         {13         }14         ~Single(void)15         {16                 //delete instance;17         }18         static TYPE* instance_;19 };20 21 template
      
       22 TYPE* Single
       
        ::instance_=0;23 24 template
        
         25 TYPE* Single
         
          ::getInstance()26 {27         if(instance_ == 0)28         {29                 instance_ = new TYPE();30         }31         return instance_;32 }33 template
          
           34 void Single
           
            ::destroy()35 {36 delete instance_;37 instance_ = 0;38 }39 40 #endif
           
          
         
        
       
      
     

模板类单例模式与单例类似，只要理解单例模式，上面的代码就很好理解

main.cpp

1 #include "single.h" 2 #include 
     
       3 #include 
      
        4 using namespace std; 5  6 class student 7 { 8 public: 9         student()10         {11                 num = 100;12                 name = "hello world";13         }14         student(int n, string na)15         {16                 num = n;17                 name = na;18         }19         string getName()20         {21                 return name;22         }23         int getNum()24         {25                 return num;26         }27 private:28         int num;29         string name;30 };31 typedef Single
       
         st;32 int main()33 {34         cout<
        
         getNum()<
         
          getName()<
          
           ::getInstance()->getName()<