#include <iostream>

 using namespace std;

 template <class T>

 void show(T *p)

 {

     //初始化

     decltype(*p) num(*p);

     cout << *p << endl;

 }

 void main()

 {

     auto man("");

     cout << typeid(man).name() << "           " << man << endl;

     auto man2(man);

     cout << typeid(man2).name() << "           " << man << endl;

     //获取变量类型,创建类型或指针,并初始化

     decltype(man) man3[]{ man,man };

     for (auto i : man3)

     {

         cout << typeid(i).name() << "           " << i << endl;

     }

     int num = ;

     show(&num);

     cin.get();

 }