#include<iostream>
using namespace std;
 
const int MAXNAME = 31;
 
struct Singleton {
    private:
 
    Singleton() {}
    Singleton(const Singleton&); // Disabling copy-ctor
    Singleton& operator=(const Singleton&);
 
    static Singleton* instance;
 
    public:
 
    int DeptNum;
    char Name[MAXNAME];
    int Age;
    int EmplID;  // key field
 
    static Singleton* GetInstance() {
        if (!instance)
            instance = new Singleton();
 
        return instance;
    }
 
};
 
//Singleton* TmpRec = NULL;
//Singleton* TmpRec = Singleton* Singleton::instance;  <- COMMENTED BECAUSE WRONG
 
int main(void) {
 
   Singleton* TmpRec = Singleton::GetInstance();
   TmpRec->DeptNum = 30;
   cout << "Value of DeptNum is: " << TmpRec->DeptNum << endl;
 
   return 0;
}
 

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