类模板分文件编写

//template.hpp
#include <iostream>

template<class typeName>
class Person
{
public:
   Person(typeName name);
   void show();

protected:
   typeName m_name;
};

template<class typeName>
Person<typeName>::Person(typeName name):
   m_name(name)
{
   
}

template<class typeName>
void Person<typeName>::show()
{
   std::cout << "name " << m_name << std::endl;
}

//template_test.cpp
#include <iostream>
#include "template.hpp"

int main()
{
   Person<std::string> p("furong");
   p.show();

   return 0;
}

$ g++ template*.cpp
$ ./a.out 
name furong

主流的解决办法：将类模板成员函数写到一起，并将后缀名改为hpp