#include<iostream>
#include<string>
using namespace std;
class Animal
{
public:
Animal()
{
cout << "animal 的构造" << endl;
}
virtual void Speak() = 0;
//子类不写析构函数也不会报错,可能因为子类有默认析构函数;
virtual ~Animal() = 0;
};
//纯虚析构必须在类外写具体的函数实现;
Animal::~Animal()
{
cout << "animal 的析构函数" << endl;
}
class Cat :public Animal
{
public:
Cat(string name)
{
cout << "cat 的构造函数" << endl;
m_Name = new string(name); //在堆区开辟空间存储name,并用指针管理;
}
void Speak() {
cout <<*m_Name<< "cat is speak:" << endl;
}
~Cat()
{
delete m_Name; //释放堆区自己开辟的name存储空间;
cout << "cat 析构函数" << endl;
}
string* m_Name;
};
int main()
{
Animal* cat = new Cat("Tom");
cat->Speak();
delete cat;
system("pause");
return 0;
}