inheritCopyConstructor.cpp

#include <iostream>
using namespace std;

class First
{
private:
	int num1, num2;
public:
	First(int n1=0, int n2=0) : num1(n1), num2(n2)
	{  }
	void ShowData() { cout<<num1<<", "<<num2<<endl; }

  First(const First &ref)
  {
    num1 = ref.num1;
    num2 = ref.num2;
  }

	First& operator=(const First&ref)
	{
		cout<<"First& operator=()"<<endl;
		num1=ref.num1;
		num2=ref.num2;
		return *this;
	}
};

class Second : public First
{
private:
	int num3, num4;
public:
	Second(int n1, int n2, int n3, int n4) 
		: First(n1, n2), num3(n3), num4(n4)
	{  }
	void ShowData() 
	{
		First::ShowData();
		cout<<num3<<", "<<num4<<endl; 
	}

  Second(const Second & ref): First(ref)
  {
    num3 = ref.num3;
    num4 = ref.num4;
  }
	/*
	Second& operator=(const Second &ref)
	{
		cout<<"Second& operator=()"<<endl;
	//	First::operator=(ref);
		num3=ref.num3;
		num4=ref.num4;
		return *this;
	}
	*/
	
};


int main(void)
{
	Second ssrc(111, 222, 333, 444);
	Second scpy(ssrc);
  //Second scpy(0, 0, 0, 0);
	//scpy=ssrc;
	scpy.ShowData();
	return 0;
}