CPP
cpp
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#include <iostream>
using namespace std;
class singleton
{
public:
static singleton* getPointer()
{
if(!m_p)
m_p = new singleton ;
return m_p;
}
private:
singleton() = default;
static singleton* m_p;
};
singleton* singleton::m_p = nullptr;
int main()
{
singleton* p1 = singleton::getPointer();
cout << p1 << endl;
singleton* p2(p1);
cout << p2 << endl;
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OUTPUT
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