继承同名成员

#include <iostream>

class Person
{
public:
   Person(int age):
      m_age(age)
   {
   }

   ~Person()
   {
   }

   void func()
   {
      std::cout << "Person func" << std::endl;
   }

   void func(int)
   {
      std::cout << "Student func(int)" << std::endl; 
   }

public:
   int m_age;
};

class Student: public Person
{
public:
   Student(int age):
      m_age(age),
      Person(age * 2)
   {
   }

   void func()
   {
      std::cout << "Student func" << std::endl;
   }

public:
   int m_age;
};

int main()
{
   Student s(10);
   std::cout << "Student age " << s.m_age << std::endl;
   std::cout << "Person age " << s.Person::m_age << std::endl;
   s.func();
   s.Person::func();

   /* 如果子类出现和父类同名的成员函数，子类的同名成员函数会隐藏掉父类中所有同名成员函数 */
   /* 如果想访问，需要加作用域 */
   //s.func(30);
   s.Person::func(30);

   return 0;
}

$ ./a.out     
Student age 10
Person age 20
Student func
Person func
Student func(int)