singliton.cpp

#include <iostream>
using namespace std;

class ConfigurationManager {
 private: 
  ConfigurationManager(){
  }
  
 public:
  static ConfigurationManager & getInstance() {
  	static ConfigurationManager cm; // automatically destroyed
    								// instantiated when needed
    return cm;
  }
  void configure() {
   cout << "Configuration successfull" << endl ; 
  }
};
int main () {
ConfigurationManager cm = ConfigurationManager::getInstance();
cm.configure();
//ConfigurationManager cm2 = new ConfigurationManager(); You cant do this, because constructor is private.
 return 0; 
}