C++ Template 만들다가 에러 났는데 ㅜㅜ...

컨테이너 만드시는 가 보군요.

링커가 고약하게도 에러를 내주는군요.

http://www.parashift.com/c++-faq-lite/templates.html#faq-35.8

http://www.parashift.com/c++-faq-lite/templates.html#faq-35.9

링커 에러가 난다면 참고해보세요.

이건 g++ 에서 돌아가도록 약간 손 본 것입니다.

#include <iostream>
#include <complex>

template <class T>
class List {

private:
    unsigned int element_cnt;
    unsigned int size;

    T* element;

    void insert(T& tmp);

    void increase_size();

public:
    List();
    List( int cnt );
    ~List();

    void add_element( T& tmp );

    int get_length() { return element_cnt; }

    int get_size() { return size; }

    void print();
   
};

template <class T> List<T>::List()
    : element_cnt(0),
      size(0),
      element(0)
{}


template <class T> List<T>::List( int cnt )
    : element_cnt(0),
      size(cnt),
      element(new T[cnt])
{}


template <class T> List<T>::~List()
{
    delete [] element;
}

template <class T> void List<T>::insert(T& tmp)
{
    element[element_cnt] = tmp;

    ++element_cnt;
}

template <class T> void List<T>::increase_size()
{
    size *= 2;

    T* temp = new T[size];

    // don't use memcpy,
    for(unsigned int i = 0; i < element_cnt; ++i) {

        temp[i] = element[i];
    }

    delete [] element;

    element = temp;
}

template <class T> void List<T>::add_element( T& tmp )
{
    if(element_cnt == size)
        increase_size();

    insert(tmp);
}

template <class T> void List<T>::print()
{
    for (unsigned int i=0; i < element_cnt; ++i )
        std::cout << element[i] << " " ;

    std::cout << "\n";
}

typedef std::complex<int> MyComplex;
template class List<MyComplex>;

typedef List<MyComplex> MyList;

int main (void)
{
    MyList cList(1);

    MyComplex cnTmp(1, 2);

    cList.add_element( cnTmp);

    cList.print();

    cList.add_element(cnTmp);

    cList.print();

    return 0;
}