#include <iostream>
#include <string>
#include <stdlib.h>

using namespace std;
class Person
{
public:
	Person(string name = "jim")
	{
		m_name = name;
		cout << "调用了Person()" << endl;
	}
	~Person()
	{
		cout << "调用了析构函数~Person()" << endl;
	}
	void play()
	{
		cout << "person--play" << endl;
		cout << m_name << endl;

	}
protected:
	string m_name;

};
class Soldier :public Person
{
public:

	Soldier(string name = "james", int age = 20)
	{
		m_name = name;
		m_age = age;
		cout << "调用了soldier（）" << endl;

	}
	~Soldier()
	{
		cout << "调用了析构函数~Soldier（）" << endl;
	}
	void work()
	{
		cout << m_name << endl;
		cout << m_age << endl;
		cout << "soldier--work()" << endl;

	}
protected:
	int m_age;
};

int main(void)
{
Person *P1=new Soldier; //用person（父类）指针指向从堆中分配来的soldier（子类）对象
P1->play();
delete P1;//销毁父类对象指针P1
P1 = NULL;
	


	system("pause");
	return 0;
}

观察现象：

解决方法：

在子类和父类的析构函数之前加上virtual

运行结果：