#include <iostream>
class Singleton
{
public: ~Singleton()
{
std::cout<<"destructor called!"<<std::endl;
}
Singleton(const Singleton&)=delete;
Singleton& operator=(const Singleton&)=delete;
static Singleton& get_instance()
{
static Singleton instance;
return instance;
}
private:
Singleton()
{
std::cout<<"constructor called!"<<std::endl;
}
};
int main(int argc, char *argv[])
{
Singleton& instance_1 = Singleton::get_instance();
Singleton& instance_2 = Singleton::get_instance();
return 0;
}