1 #include 
     
       2 #include 
      
        3 using namespace std; 4  5 void main() 6 { 7     //&调用外部 8     //function
       
         fun = [&]()->void {cout << "hello" << endl; fun(); }; 9     function
        
          fun = [&](int i)10     {11         if (i == 0)12         {13             return 0;14         }15         else16         {17             cout << i << endl;18             fun(i-1);19         }20     };21     fun(100);22     system("pause");23 }