45 C++ - 继承中同名成员的处理方法

class Base{
public:
  Base():mParam(0){}
  void Print(){ cout << mParam << endl; }
public:
  int mParam;
};
class Derived : public Base{
public:
  Derived():mParam(10){}
  void Print(){
    //在派生类中使用和基类的同名成员,显示使用类名限定符
    cout << Base::mParam << endl;
    cout << mParam << endl;
  }
  //返回基类重名成员
  int& getBaseParam(){ return  Base::mParam; }
public:
  int mParam;
};
int main(){
  Derived derived;
  //派生类和基类成员属性重名，子类访问成员默认是子类成员
  cout << derived.mParam << endl; //10
  derived.Print();
  //类外如何获得基类重名成员属性
  derived.getBaseParam() = 100;
  cout << "Base:mParam:" << derived.getBaseParam() << endl;
  return EXIT_SUCCESS;
}

class Base{
public:
  void func1(){
    cout << "Base::void func1()" << endl;
  };
  void func1(int param){
    cout << "Base::void func1(int param)" << endl;
  }
  void myfunc(){
    cout << "Base::void myfunc()" << endl;
  }
};
class Derived1 : public Base{
public:
  void myfunc(){
    cout << "Derived1::void myfunc()" << endl;
  }
};
class Derived2 : public Base{
public:
  //改变成员函数的参数列表
  void func1(int param1, int param2){
    cout << "Derived2::void func1(int param1,int param2)" << endl;
  };
};
class Derived3 : public Base{
public:
  //改变成员函数的返回值
  int func1(int param){
    cout << "Derived3::int func1(int param)" << endl;
    return 0;
  }
};
int main(){
  Derived1 derived1;
  derived1.func1();
  derived1.func1(20);
  derived1.myfunc();
  cout << "-------------" << endl;
  Derived2 derived2;
  //derived2.func1();  //func1被隐藏
  //derived2.func1(20); //func2被隐藏
  derived2.func1(10,20); //重载func1之后，基类的函数被隐藏
  derived2.myfunc();
  cout << "-------------" << endl;
  Derived3 derived3;
  //derived3.func1();  没有重新定义的重载版本被隐藏
  derived3.func1(20);
  derived3.myfunc();
  return EXIT_SUCCESS;
}