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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. class Manar{
  5.     private:
  6.     static Manar* manora;
  7.     Manar(){
  8.         cout <<"manar's constructor\n";
  9.     }
  10.     public:
  11.     Manar(const Manar&)=delete;// Delete copy constructor
  12.     Manar &operator =(const Manar&)=delete;// Delete assignment operator
  13.  
  14.     static Manar* getInstance(){
  15.         if(manora == nullptr){
  16.             manora = new Manar();
  17.         }
  18.         return manora;
  19.  
  20.     }
  21.     void mess(){
  22.         cout <<"done \n";
  23.     }
  24.     ~Manar(){
  25.         cout <<"destructor\n";
  26.     }
  27. };
  28. Manar* Manar::manora =nullptr;
  29. int main(){
  30.     Manar* manora = Manar::getInstance();
  31.     manora->mess();
  32.     Manar* manora2 =Manar::getInstance();
  33.     manora2->mess();
  34.     delete manora;
  35.     return 0;
  36. }
Success #stdin #stdout 0.01s 5284KB
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stdin
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Standard input is empty
stdout
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manar's constructor
done 
done 
destructor
https://ideone.com/O4Zza7
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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