帮我看下这个程序。说链接错误。

这是Array.H头文件：
#ifndef ARRAY_H
#define ARRAY_H

#include <iostream>
using namespace std;

template <typename elemType>
class Array
{
public:
    Array(elemType *, int);
    ~Array();

    elemType &operator [](int) const;
    void display() const;
    friend ostream &operator <<(ostream &, const Array &);
private:
    int _size;
    elemType *pArray;
};

template <typename elemType>
inline Array<elemType>::Array(elemType *elem, int size):
_size(size)
{
    pArray = new elemType[_size];

    for(int ix=0;ix<_size;++ix)
    {
        pArray[ix] = elem[ix];
    }
}

template <typename elemType>
inline Array<elemType>::~Array()
{
    delete [] pArray;
}

template <typename elemType>
inline elemType &Array<elemType>::operator [](int offset) const
{
    if(offset >= _size)
    {
        cout << "数组越界!" << endl;

        exit(-1);
    }
    else
        return pArray[offset];
}

template <typename elemType>
inline void Array<elemType>::display() const
{
    for(int ix=0;ix<_size;++ix)
        cout << pArray[ix] << " ";

    cout << endl;
}

#endif

这是Array.cpp源文件：
#include "Array.h"
#include <iostream>
using namespace std;

template <typename elemType>
ostream &operator <<(ostream &os, const Array<elemType> &theArray)
{
    for(int ix=0;ix<_size;++ix)
        os << theArray.pArray[ix] << " ";

    return os;
}

int main()
{
    int ia[] = {12,25,62,74,29,38,41,82};
    Array<int> intArray(ia,sizeof(ia)/sizeof(ia[0]));
    intArray.display();

    cout << intArray << endl;
   
    return 0;
}

但是运行程序，说链接错误，请大侠帮忙看看。