用C++写一个基类，一个派生类，一个派生的派生，输出他们构造函数、析构函数执行的顺序

以下是用C++写的例子，因为C语言不支持类的概念：

#include <iostream>
using namespace std;

class Base {
public:
    Base() {
        cout << "Base Constructor" << endl;
    }
    virtual ~Base() {
        cout << "Base Destructor" << endl;
    }
};

class Derived : public Base {
public:
    Derived() {
        cout << "Derived Constructor" << endl;
    }
    ~Derived() {
        cout << "Derived Destructor" << endl;
    }
};

class SubDerived : public Derived {
public:
    SubDerived() {
        cout << "SubDerived Constructor" << endl;
    }
    ~SubDerived() {
        cout << "SubDerived Destructor" << endl;
    }
};

int main() {
    SubDerived subDerived;
    return 0;
}

输出结果为：

Base Constructor
Derived Constructor
SubDerived Constructor
SubDerived Destructor
Derived Destructor
Base Destructor

可以看到，构造函数的执行顺序是从基类到派生类，析构函数的执行顺序则相反，从派生类到基类。这是因为在创建对象时，先创建基类，再创建派生类，而在销毁对象时，则是先销毁派生类，再销毁基类。