using namespace std;

​

template <typename T>

class Data

{

private:

    T data_;

public:

    Data(T dt);

    T get_data();

};

​

template <> class Data<double>  // double형에 대한 명시적 특수화 

{

private:

    double data_;

public:

    Data(double dt) { data_ = dt; }

    double get_data()

    {

        cout << "double형 데이터를 출력합니다." << endl;

        return data_;

    }

};

​

int main(void)

{

    Data<string> str_data("C++ 수업");

    Data<double> double_data(3.14);

    cout << "str_data : " << str_data.get_data() << endl;   

    cout << "double_data : " << double_data.get_data() << endl;

    return 0;

}

​

template <typename T>

Data<T>::Data(T dt)

{

    data_ = dt;

}

​

template <typename T>

T Data<T>::get_data()

{

    return data_;

}