C++之Name Hiding

• 子类中重新定义父类函数（重定义、修改返回类型、修改参数），自动在子类中隐藏掉该函数的其他版本（重载函数）

• #include "stdafx.h"
  #include <iostream> 
  using namespace std; 
  
  class Base 
  { 
  public: 
      int f() const 
      {  
          cout << "int Base::f()"<<endl;  
          return 1;  
      } 
      int f(int) const 
      {
          cout << "int Base::f(int)"<<endl;
          return 1; 
      } 
  }; 
  
  class Derived1 : public Base 
  { 
  public: 
      // Redefinition: 
      int f() const 
      { 
          cout << "int Derived1::f()"<<endl;
          return 1;
      } 
  }; 
  
  class Derived2 : public Base 
  { 
  public: 
      // Change return type: 
      void f() const { cout << "void Derived2::f()"<<endl;} 
  }; 
  
  class Derived3 : public Base 
  { 
  public: 
      // Change argument list: 
      int f(double,int) const 
      {  
          cout << "int Derived3::f(double,int)"<<endl;  
          return 1;  
      } 
  }; 
  
  int main() 
  {
      int x = 0;
      
      Derived1 d1;
      x = d1.f();
      //x = d1.f(1);
  
      Derived2 d2;
      d2.f();
      //x = f();
      //x = f(1);
  
      Derived3 d3;
      x = d3.f(1.0,1);
      //x = f();
      //x = d3.f(1);
  
      return 0;
  }

• 参考《Thinking in C++》