为什么我的simpleVector.cpp没有链接?(从c++开始)

我直接从书中得到了。cpp和。h，似乎没有什么缺失，但我得到了这些链接错误....

#ifndef SIMPLEVECTOR_H
#define SIMPLEVECTOR_H
#include <iostream>
#include <new>          // needed for bad__alloc exception
#include <cstdlib>      // needed for the exit function
using namespace std;
template <class T>
class simplevector
{
private:
    T *aptr;
    int arraysize;
    void memerror(); // handles mem aloc errors
    void suberror(); // handles subscripts out of range
public:
    simplevector() // default constructor
    { aptr = 0; arraysize = 0; }
    simplevector(int); // constructor
    simplevector(const simplevector &); // coppy constructor
    ~simplevector();
    int size()
        { return arraysize; }
    T &operator[](const int &); // overloaded [] operator
};
template <class T>
simplevector<T>::simplevector(int s)
{
    arraysize = s;
    // allocate memory for the array
    try
    {
        aptr = new T [s];
    }
    catch (bad_alloc)
    {
        memerror();
    }
    // initialize the array.
    for (int count = 0; count < arraysize; count++)
        *(aptr + count) = 0;
}
template <class T>
simplevector<T>::simplevector(const simplevector &obj)
{
    arraysize = obj.arraysize;
    aptr = new T [arraysize];
    if (aptr == 0)
        memerror();
    for(int count = 0; count < arraysize; count++)
        *(aptr + count) = *(obj.aptr + count);
}
template <class T>
simplevector<T>::~simplevector()
{
    if (arraysize > 0)
        delete [] aptr;
}
template <class T>
void simplevector<T>::memerror()
{
    cout << "ERROR: Cannot allocate memory.n";
    exit(0);
}
template <class T>
T &simplevector<T>::operator [](const int &sub)
{
    if (sub < 0 || sub >= arraysize)
        suberror();
    return aptr[sub];
}
#endif

这个程序演示了simplevector模板:

#include <iostream>
#include "simplevector.h"
using namespace std;
int main()
{
    simplevector<int> inttable(10);
    simplevector<float> floattable(10);
    int x;
    //store values in the arrays.
    for (x = 0; x < 10; x++)
    {
        inttable[x] = (x * 2);
        floattable[x] = (x * 2.14);
    }
    //display the values in the arrays.
    cout << "these values are in inttable:n";
    for (x = 0; x< 10; x++)
        cout << inttable[x] << " ";
    cout << endl;
    cout << "these values are in floattable:n";
    for (x = 0; x< 10; x++)
        cout << floattable[x] << " ";
    cout << endl;
    //use the standard + operator on array elements.
    cout << "nAdding 5 to each element of inttable"
        << " and floattable.n";
    for (x = 0; x< 10; x++)
    {
        inttable[x] = inttable[x] + 5;
        floattable[x] = floattable[x] + 1.5;
    }
    //display the values in the array.
    cout << "These values are in inttable:n";
    for (x = 0; x< 10; x++)
        cout << inttable[x] << " ";
    cout << endl;
    cout << "These values are in floattable:n";
    for (x = 0; x< 10; x++)
        cout << floattable[x] << " ";
    cout << endl;
    // use the standard ++ operator on array elements.
    cout << "nIncrementing each element of inttable and" 
        << " floattable.n";
    for (x = 0; x< 10; x++)
    {
        inttable[x]++;
        floattable[x]++;
    }
    //display the values in the array.
    cout << "These values are in inttable:n";
    for (x = 0; x< 10; x++)
        cout << inttable[x] << " ";
    cout << endl;
    cout << "These values are in floattable:n";
    for (x = 0; x< 10; x++)
        cout << floattable[x] << " ";
    cout << endl;
    return 0;
}