Singleton lifecycle.

C++SingletonLifeCycle.cpp

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#include <iostream>
#include <string>

void printy(std::string msg)
{
    std::cout << "MSG: " << msg << std::endl;
}

class Gino {
    
public:
    
    static Gino & getInstance()
    {
        printy("Gino::getInstance()");
        static Gino instance;
        return instance;
    }
    
    void sayHello()
    {
        printy("Gino says: Hello!");
    }

private:

    Gino()
    {
        printy("Gino::Gino()");
    }
    
    ~Gino()
    {
        printy("Gino::~Gino()");
    }
    
};

int main()
{
    printy("=== C++ Singleton life cycle ===");
    printy("Entered main() ...");
    Gino::getInstance().sayHello();
    
    printy("... Exiting main() .");
    return 0;
}