using namespace std;

​

template <typename T>

void Swap(T& a, T& b);

​

template <> void Swap<double>(double&, double&);

​

int main(void)

{

    int c = 2, d = 3;

    cout << "c : " << c << ", d : " << d << endl;

    Swap(c, d);

    cout << "c : " << c << ", d : " << d << endl;

    double e = 1.234, f = 4.321;

    cout << "e : " << e << ", f : " << f << endl;

    Swap(e, f);

    cout << "e : " << e << ", f : " << f << endl;

    return 0;

}

​

template <typename T>

void Swap(T& a, T& b)

{

    T temp;

    temp = a;

    a = b;

    b = temp;   

}

​

template <> void Swap<double>(double&, double&)

{

    // double형은 값을 서로 바꾸지 않음. 

}