Quick Sorting ?!?!?

Hi!
I am really in trouble with this code
I am not sure where is the mistake. Waiting for some good help

Code:

#include<iostream.h>


template<class T> void quickSort(T* a, int lo, int hi)
{
	if (lo >= hi)
		return;
	T pivot = a[hi];

	int i = lo - 1;
	int j = hi;

  while (i < j)
  {
		while (a[++i] < pivot) ;
		while (j >= 0 && a[--j] > pivot) ;

		if (i < j)
			swap(a[i], a[j]);
  }

  swap(a[i], a[hi]);

  quicksort(a, lo, i-1);
  quicksort(a, i+1, hi);
}

template<class T> void sort(T* a, int n)
{
	quicksort(a, 0, n-1);
}


int main()
{
	const int n = 7;

	int ary[n] = {9, 5, 1, 8, 3, 4, 6};

	cout << " Before soring : ";

	for(int i=0;i<n;++i)
		cout << ary[i] << '\t';

	sort(ary,n);

	cout << "\n After sorting : ";

	for(int i=0;i<n;++i)
		cout << ary[i] << '\t';

	return 0;
}

Code:

#include<iostream.h>

template<class T> void quickSort(T* a, int lo, int hi)
{
	if (lo >= hi)
		return;
	T pivot = a[hi];

	int i = lo - 1;
	int j = hi;

  while (i < j)
  {
		while (a[++i] < pivot) ;
		while (j >= 0 && a[--j] > pivot) ;

		if (i < j)
			swap(&a[i],&a[j]);
  }

  swap(&a[i], &a[hi]);

  quickSort(a, lo, i-1);
  quickSort(a, i+1, hi);
}

template<class T> void sort(T* a, int n)
{
	quickSort(a, 0, n-1);
}

template<class T> void swap(T *a, T *n)
{
	T temp = *a;
	*a = *n;
	*n = temp;
}

int main()
{
	const int n = 7;
	int i;

	int ary[n] = {9, 5, 1, 8, 3, 4, 6};

	cout << " Before soring : ";

	for( i = 0;i<n;++i)
		cout << ary[i] << '\t';

	sort(ary,n);

	cout << "\n After sorting : ";

	for( i=0;i<n;++i)
		cout << ary[i] << '\t';

	return 0;
}

If you really couldn't find the errors yourself, then you shouldn't be dealing with templates at this stage.

Sorry! I thought It would work!

Code:

#include <algorithm>

template <class T>
   void swap (T& a, T& b);

But I didn't included it!!!
Now will it be ok?

How can I make many of my functions within TEMPLATEs ?