多个单例对象，析构顺序模拟-白红宇

多个单例对象，析构顺序模拟

阅读量：4092 次

发布时间：2019-05-25

本文共 2055 字，大约阅读时间需要 6 分钟。

#include 
   
    #include 
    
     using namespace std;struct StaticMember{
   public:    int age = 6;    StaticMember()    {
           std::cout << "StaticMember()" << std::endl;    }    ~StaticMember()    {
           std::cout << "~StaticMember()" << std::endl;    }};struct StaticMember2{
       StaticMember2()    {
           std::cout << "StaticMember2()" << std::endl;    }    ~StaticMember2()    {
           std::cout << "~StaticMember2()" << std::endl;    }};struct PlainMember{
       PlainMember()    {
           std::cout << "PlainMember()" << std::endl;    }    ~PlainMember()    {
           std::cout << "~PlainMember()" << std::endl;    }};struct PlainMember2{
       PlainMember2()    {
           std::cout << "PlainMember2()" << std::endl;    }    ~PlainMember2()    {
           std::cout << "~PlainMember2()" << std::endl;    }};struct StaticMember3{
       StaticMember3()    {
           std::cout << "StaticMember3()" << std::endl;    }    ~StaticMember3()    {
           std::cout << "~StaticMember3()" << std::endl;    }};class MyClass{
   public:    static MyClass *GetInstance()    {
           static MyClass a;        return &a;    }    static StaticMember3*getStatic()    {
           static  StaticMember3 pl3;        return &pl3;    }    static void print()    {
           getStatic();        std::cout << "/* message */" << std::endl;    }private:    MyClass();    ~MyClass();public:    PlainMember2 plainMember2;    PlainMember plainMember;    static StaticMember2 staticMember2;    static StaticMember staticMember;};MyClass::MyClass(){
       std::cout << "MyClass()" << std::endl;}MyClass::~MyClass(){
       print();    std::cout << "~MyClass()" << std::endl;    std::cout << "~MyClass():~StaticMember(),age:"  << staticMember.age << std::endl;}StaticMember MyClass::staticMember;StaticMember2 MyClass::staticMember2;int main(int argc, const char **argv){
       // std::cout <<     MyClass::GetInstance()->staticMember.age ;    //<< std::endl;    //std::cout << MyClass::getStatic() << std::endl;    return 0;}