父類和子類的析構順序主要是

　　父類建構函式->子類建構函式->執行main裡的函式呼叫->子類析構器->父類析構器

//
// Created by qq302 on 2020/7/19.
//
#include <iostream>
#include <string>

class BaseClass{
public:
    BaseClass();
    ~BaseClass();
    void dosomething();

    void doSomething();
};

class SubClass : public BaseClass {
 
public:
    SubClass();
    ~SubClass();
};

BaseClass::BaseClass() {
    std::cout << "進入基類構造器...'\n'";
    std::cout << "我在基類構造器裡面幹了些事...\n";
}

BaseClass::~BaseClass() {
    std::cout << "進入基類析構器...\n";
    std::cout << "我在基類析構器也幹了某些事....\n";
}

void BaseClass::doSomething() {
    std::cout 
 
<< "我幹了某些事...\n";
}

SubClass::SubClass() {
    std::cout << "進入子類構造器" << std::endl;
    std::cout << "我在子類構造器裡還幹了某些事" << std::endl;
}

SubClass::~SubClass() {
    std::cout << "進入子類析構器" << std::endl;
}

int main() {

    SubClass subclass;
    subclass.doSomething();

    std::cout 
 
<< "完事收工" << std::endl;
    return 0;
}