Why isnt my simpleVector.cpp linking? (starting out with c++) - c++

Question

i got the .cpp and .h straight from the book, it seems as if nothing is missing, but im getting these linking errors....
#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
This program demonstrates the simplevector template:
#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;
}

Answer 1

It's right there in the errors you posted in the OP comments - you declared simplevector::suberror without ever defining it.

Answer 2

Where are the guts of suberror()? I don't see that in the class implementation.