singleton c 2b 2b

Solutions on MaxInterview for singleton c 2b 2b by the best coders in the world

showing results for - "singleton c 2b 2b"
Paola
26 May 2016
1class S
2{
3    public:
4        static S& getInstance()
5        {
6            static S    instance; // Guaranteed to be destroyed.
7                                  // Instantiated on first use.
8            return instance;
9        }
10    private:
11        S() {}                    // Constructor? (the {} brackets) are needed here.
12
13        // C++ 03
14        // ========
15        // Don't forget to declare these two. You want to make sure they
16        // are unacceptable otherwise you may accidentally get copies of
17        // your singleton appearing.
18        S(S const&);              // Don't Implement
19        void operator=(S const&); // Don't implement
20
21        // C++ 11
22        // =======
23        // We can use the better technique of deleting the methods
24        // we don't want.
25    public:
26        S(S const&)               = delete;
27        void operator=(S const&)  = delete;
28
29        // Note: Scott Meyers mentions in his Effective Modern
30        //       C++ book, that deleted functions should generally
31        //       be public as it results in better error messages
32        //       due to the compilers behavior to check accessibility
33        //       before deleted status
34};
Jason
18 Jul 2019
1#include <iostream>
2
3using namespace std;
4
5class Singleton {
6   static Singleton *instance;
7   int data;
8 
9   // Private constructor so that no objects can be created.
10   Singleton() {
11      data = 0;
12   }
13
14   public:
15   static Singleton *getInstance() {
16      if (!instance)
17      instance = new Singleton;
18      return instance;
19   }
20
21   int getData() {
22      return this -> data;
23   }
24
25   void setData(int data) {
26      this -> data = data;
27   }
28};
29
30//Initialize pointer to zero so that it can be initialized in first call to getInstance
31Singleton *Singleton::instance = 0;
32
33int main(){
34   Singleton *s = s->getInstance();
35   cout << s->getData() << endl;
36   s->setData(100);
37   cout << s->getData() << endl;
38   return 0;
39}
queries leading to this page
implementation of singleton class in c 2b 2bsingleton pattern c 2b 2bhow singleton be implemented in c 2b 2bglobal singleton c 2b 2bwhat are singleton classes c 2b 2bc 2b 2b simple singletonsingleton pattern cppsingleton class cppsingleton class c 2b 2b examplehow are singleton classes implemented in cppsingleton class c 2b 2bget instance of singleton class c 2b 2bsingleton force a etre publicsingleton cpp 5chow to make a singleton in c 2b 2bcpp singletonsingleton in c 2b 2b examplescpp singletonec 2b 2b implement singleton classhow to declare a singleton class in c 2b 2bsingleton algorithm c 2b 2bhow to deal with singleton c 2b 2bcpp singleton patternc 2b 2b how to use singleton class example of singleton c 2b 2bcreate a singleton c 2b 2bsingleton c 2b 2b exampleimplement singleton class in c 2b 2b using new keyworddo you know about singleton class 3f in c 2b 2bc 2b 2b whats a singletonc 2b 2b signleton instancesingleton design pattern cppwhat is singleton class in c 2b 2bhow to make a class singleton in c 2b 2bwrite a singleton class in c 2b 2bsingleton class in c 2b 2b geeksforgeeksc 2b 2b singleton class examplewhat re singleton classes in c 2b 2bc 2b 2b singleton design patternsingleton in c 2b 2bwhat is singleton class c 2b 2bc 2b 2b singletonsingleton objects in c 2b 2bmake singleton class c 2b 2bsingleton design pattern in c 2b 2b in depthhow to use singleton c 2b 2bsingleton implementation c 2b 2b c 2b 2b using a singletonc 2b 2b singleton with methodssingleton cppc 2b 2b singleton algorithmc 2b 2b singleton patterncpp create singletonc 2b 2b singleton 2bhow to make a class singleton c 2b 2bsingleton pattern in c 2b 2bdesign singleton class c 2b 2bis singleton a keyword c 2b 2bc 2b 2b singleton classc 2b 2b static singletonc 2b 2b singleton designsingleton with reference c 2b 2bsingleton in another class c 2b 2bc 2b 2b singleton staticc 2b 2b singleton explainedwhat is a singleton class c 2b 2bcpp singleton classimplement singleton class in c 2b 2bc 2b 2b singleton examplesingleton c 2b 2bcall a singleton cppimplement singleton c 2b 2bhow to make singleton in cppsingleton class in c 2b 2bsingleton design pattern in c 2b 2bsingleton design pattern c 2b 2b 5csingleton object c 2b 2b examplesingleton design pattern c 2b 2bc 2b 2b implement a singleton patternsingleton class in cppsingleton c 2b 2b classinherit singleton class c 2b 2bwhat is singleton c 2b 2bwhat is a singleton class in c 2b 2bsingleton object in c 2b 2bhow to have a singleton c 2b 2bc 2b 2b singleton class inheritancec 2b 2b singleton declare in headersingleton class example c 2b 2bsingleton template class c 2b 2bc 2b 2b singleton pattern examplewhat is singleton in c 2b 2bc 2b 2b singleton in classhow tae singleton classes implemented in cppc 2b 2b use singletonsingleton implementation cppsingleton c 2b 2b