- #include <functional> 
- #include <iostream> 
-   
- std::function<void(int)> wrapper(std::function<void(int)> f){ 
-     return [f](int arg){ 
-         f(arg); 
-     }; 
- } 
-   
- void print_n(int n){ 
- 	std::cout << n << std::endl; 
- } 
-   
- int main() 
- {	 
- 	wrapper(print_n)(10); 
- 	return 0; 
- } 
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