类模板与函数模板区别2

#include <iostream>

template<class typeName, class typeAge = int>
class Person
{
public:
   Person(typeName name, typeAge age):
   name(name),
   age(age)
   {}

   void show()
   {
      std::cout << "name " << name << std::endl;
      std::cout << "age " << age << std::endl;
   }

protected:
   typeName name;
   typeAge age;
};

int main()
{
   Person<std::string> p("furong", 10);
   p.show();

   return 0;
}

$ ./a.out               
name furong
age 10

注：类模板中，模板参数列表可以有默认参数