ref class A{
public:
	static A^ getInstance(){
		if(INSTANCE==nullptr)
			INSTANCE=gcnew INSTANCE();
		return INSTANCE;
	}

	void destroyInstance(){
		delete INSTANCE;
	}

	...
private:
	int n;
	char **c;
	unsigned char *d;
	String ^str;
	Int32 ^intptr;
	array<String^> ^aS;
	Int32 num;

	A(){
		this->n=0;
		this->c=new char*[10];
		for(int i=0;i<10;i++) this->c[i]=new char[100];
		this->d=new unsigned char[20];
		this->str=gcnew String("A");
		this->intptr=gcnew IntPtr();
		this->aS=gcnew String^[100];
		for(int i=0;i<100;i++) this->aS[i]=gcnew String();
		this->num=1;
	}

	!A(){
		for(int i=0;i<10;i++){
			delete[] this->c;
			this->c=NULL;
		}
		delete[] this->c;
		this->c=NULL;
		delete[] this->d;
		this->d=NULL;
	}

	~A(){
		this->!A();
		delete this->str;
		this->str=nullptr;
		delete this->intptr;
		this->intptr=nullptr;
		for(int i=0;i<100;i++){
			delete this->aS[i];
			this->aS[i]=nullptr;
		}
	}
}