【c++】 继承机制中的构造器和析构器

就是有关于执行顺序的问题啦

类似于中括号和大括号的机制

#include<iostream>
#include<string>
using namespace std;
 
class BaseClass//基类 
{
public:
	BaseClass();//基类构造器 
	~BaseClass();//基类析构器
	void doSomething();
};
 
class SubClass:public BaseClass
{
public:
	SubClass();
	~SubClass();
};
 
BaseClass::BaseClass()
{
	cout<<"基类构造器执行"<<endl;
	cout<<"-----------------"<<endl;
}
 
BaseClass::~BaseClass()
{
	cout << "基类析构器执行" << endl;
	cout << "-----------------" << endl;
}
 
void BaseClass::doSomething()
{
	cout<<"基类内定义函数执行"<<endl;
	cout<<"-----------------"<<endl;
}
 
SubClass::SubClass()
{
	cout<<"子类构造器执行"<<endl;
	cout<<"-----------------"<<endl;
}
 
SubClass::~SubClass()
{
	cout<<"子类析构器执行"<<endl;
	cout<<"-----------------"<<endl;
}
 
int main()
{
	SubClass subclass;
	subclass.doSomething();
 
	cout<<"main函数执行!"<<endl;
	cout<<"-----------------"<<endl;
	return 0;
}