初学编程C++之多继承

多继承示例：

#include <iostream>
#include <string>
#include <stdlib.h>
using namespace std;
/*
  多继承：
    要求：Farmer类  数据成员：m_strName;成员函数：构造函数、析构函数、sow();
	      Worker类  数据成员：m_srCore;成员函数：构造函数、析构函数、carry();
		  Migrantworker类：数据成员：无;成员函数：构造函数、析构函数
*/

class Farmer
{
public:
	Farmer(string name = "jack");
	virtual ~Farmer();
	void sow();
protected:
	string m_strName;
};
Farmer::Farmer(string name)
{
	m_strName = name;
	cout << "Farmer()" <<endl;
}
Farmer::~Farmer()
{
	cout << "~Farmer()" << endl;
}
void Farmer::sow()
{
	cout << m_strName << endl;
	cout << "Farmer-sow()" << endl;
}

class Worker
{
public:
	Worker(string code = "001");
	virtual ~Worker();
	void carry();
protected:
	string m_strCode；
};

Worker::Worker(string code)
{
	m_strCode = code;
	cout << "Worker()" << endl;
}
Worker::~Worker()
{
	cout << "~Worker()" << endl;
}
void Worker::carry()
{
	cout << m_strCode << endl;
	cout << "Worker-carry()" << endl;
}

class Migrantworker : public Farmer, public Worker
{
public:
	Migrantworker(string name, string code);
	~Migrantworker();
};
Migrantworker::Migrantworker(string name, string code) : Farmer(name), Worker(code)
{
	cout << "Migrantworker()" << endl;
}
Migrantworker::~Migrantworker()
{
	cout << "Migrantworker()" << endl;
};


int main(void)
{
	
	Migrantworker *p = new Migrantworker("jerry", "100");
	p->carry();
	p->sow();
	delete p;
	p=NULL;

	system("pause");
	return 0;
}
	

打印结果：