All my function work besides one, and it is because I can't find whats wrong with my syntax on line 22, could someone please help me? I know it has to be a simple solution that I am overlooking.

#include "Vector.h"
#include <iostream>
using namespace std;
const int zero = 0;
using namespace cop4530;

    template<typename T>
    Vector<T>::Vector( ) : theSize(zero), theCapacity(zero), array(NULL)
    {
    }

    template<typename T>
    Vector<T>::Vector(const Vector &rhs)
    {
        this = (rhs);
    }   

   //prototype
   //explicit Vector(int num, const T& val = T());

   template<typename T>
   Vector<T>::Vector(int num, const T& val = T())
   {
   }


   template<typename T>
   Vector<T>::~Vector()
   {
       delete [] array;
   }

template<typename T>
const Vector<T> & Vector<T>::operator=(const Vector &rhs)
{
    if (this != &rhs)
    {
        delete [] array;
        theSize = rhs.size();
        theCapacity = rhs.theCapacity();

        array = new T[capacity()];

        for (int i = 0; i < size(); i++) 
            array[i]= rhs.array[i];

    }
    return *this;
}





   template<typename T>
   T& Vector<T>::operator[](int index)
   {
       return array[index];
   }

   template<typename T>
const T& Vector<T>::operator[] (int index) const
   {
       return array[index];
   }

template<typename T>
Vector<T>::Vector(const_iterator start, const_iterator end)
{

}

template<typename T>
T& Vector<T>::at(int loc )
{
    if(loc < zero || loc >= theSize)
        throw std::out_of_range("loc<0 or loc>=theSize");
    return array[loc];
}

template<typename T>
const T& Vector<T>::at(int loc ) const
{
    if(loc < zero || loc >= theSize)
        throw std::out_of_range("loc<0 or loc>=theSize");
    return array[loc];
}

template<typename T>
T& Vector <T>::front()
{
    return array[zero];
}

template<typename T>
T& Vector <T>::back()
{
    return array[theSize - 1];  
}


template<typename T>
const T& Vector<T>::front() const
{
    return array[zero];
}

template<typename T>
const T& Vector<T>::back() const
{
    return array[theSize - 1];
}

template<typename T>
int Vector <T>::size() const
{
    return theSize;
}

template<typename T>
int Vector <T>::capacity() const
{
    return theCapacity;
}



template<typename T>
bool Vector<T>::empty() const
{
    return size() == zero;
}

template<typename T>
void Vector<T>::push_back(const T & val)
{
    if (theSize + 1 == theCapacity)
    {
        doubleCapacity(); //double capacity function
        T * temp;
        temp = new T[theSize];
        for (int i =zero; i < theSize; i++)
        temp[i] = array[i];
        delete [] array;
        array = new T[theCapacity];
        for (int i =zero; i < theSize; i++)
        array[i] = temp[i];
        array[theSize] = val;
        delete [] temp;
        theSize++;
    }
    else
    {
        array[theSize] = val;
        theSize++;
    }

}


template<typename T>
void Vector<T>::pop_back()
{
    theSize--;

}


//???
template<typename T>
void Vector<T>::reserve(int size)
{
    if (size > theSize)
        return;
    T *newarray = array;
    array = new T[size];
    for (int i = zero; i < theSize ; i++)
        array[i] = newarray[i];
    theSize = size;
    delete [] newarray;
}

template<typename T>
void Vector<T>:: doubleCapacity()
{
    2*theCapacity;

}

template<typename T>
void Vector<T>::clear()
{
    if (array != NULL)
    {
        delete [] array;
        array = NULL;
        theSize = zero;
        theCapacity = zero;


    }
}

template<typename T>
typename Vector<T>::iterator Vector <T>::begin()
{
    return array;
}


template<typename T>
typename Vector<T>::iterator Vector <T>::end()
{
    return array + size();
}

In your implementation here

template<typename T>
   Vector<T>::Vector(int num, const T& val = T())
   {
   }

You are trying to state it as a declaration, as would be in the header file. You need to do this:

template<typename T>
   Vector<T>::Vector(int num, const T& val)
   {
   }

Leaving the default value out of the signature.

Thank you so much Rubberman lol, quick question if thats the case then when I have function like the following I wouldn't be able to do this:

//Prototype
//iterator insert(iterator itr, const T& val);
template<typename T>
typename Vector<T>::insert(iterator itr, const T & val)
{

}

I think it would be something like this:

//Prototype
//iterator insert(iterator itr, const T& val);
template<typename T>
T& Vector<T>::insert(iterator itr, const T & val)
{
}

Assuming you want to return a reference to the actually inserted item.

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