Help with Specialization error

[iExtreme]

Hey guys, I'm doing a simple program that uses a template function to take an array of any type and returns the largest item in the array, but I also want to use a specialization that takes an array of pointer to char argument and returns the address of the largest string, I'm required to use specialization to make it work.

Here's my code:

// ex86.cpp -- 6th exercise-8th chapter

#include <iostream>
#include <cstring>

template <typename T>
T maxn(T arr[], int ct);

template <> char* maxn<char>(char* str[], int ct);

int main()
{
	using namespace std;
	int iarr[6];
	cout << "Enter 6 integers:\n";
	for (int i = 0; i < 6; i++)
	{
		cout << "Integer #" << i + 1 << ": ";
		cin >> iarr[i];
	}
	double darr[4];
	cout << "Enter 4 doubles:\n";
	for (int i = 0; i < 4; i++)
	{
		cout << "Double #" << i + 1 << ": ";
		cin >> darr[i];
	}
	int max_int;
	double max_double;
	max_int = maxn(iarr, 6);
	max_double = maxn(darr, 4);
	cout << "Max integer value = " << max_int << endl;
	cout << "Max double value = " << max_double << endl;

	char *str[5];
	for (int i = 0; i < 5; i++)
		str[i] = new char[80];
	cout << "Enter 5 strings [max 80 chars]:\n";
	for (int i = 0; i < 5; i++)
	{
		cout << "String #" << i + 1 << ": ";
		cin.getline(str[i], 80);
	}
	char *cp = maxn(str, 5);
	cout << "The longest string is: " << cp << endl;
	return 0;
}

template <typename T>
T maxn(T arr[], int ct)
{
	T max = arr[0];
	for (int i = 1; i < ct; i++)
		if (arr[i] > max)
			max = arr[i];
	return max;
}

template <> char* maxn<char>(char* str[], int ct)
{
	char* max = str[0];
	for (int i = 1; i < ct; i++)
		if (strlen(str[1]) > strlen(max))
			max = str[i];
	return max;
}

Now whenever I compile I get that error in VS2010:

error C2912: explicit specialization; 'char *maxn<char>(char *[],int)' is not a specialization of a function template

I made another instance of the code using non-template function to overload when using char* and the program worked like a charm, here's the code:

// ex86.cpp -- 6th exercise-8th chapter

#include <iostream>
#include <cstring>

template <typename T>
T maxn(T arr[], int ct);

char* maxn(char* str[], int ct);

int main()
{
	using namespace std;
	int iarr[6];
	cout << "Enter 6 integers:\n";
	for (int i = 0; i < 6; i++)
	{
		cout << "Integer #" << i + 1 << ": ";
		cin >> iarr[i];
	}
	double darr[4];
	cout << "Enter 4 doubles:\n";
	for (int i = 0; i < 4; i++)
	{
		cout << "Double #" << i + 1 << ": ";
		cin >> darr[i];
	}
	int max_int;
	double max_double;
	max_int = maxn(iarr, 6);
	max_double = maxn(darr, 4);
	cout << "Max integer value = " << max_int << endl;
	cout << "Max double value = " << max_double << endl;
	cin.get();

	char *str[5];
	for (int i = 0; i < 5; i++)
		str[i] = new char[80];
	cout << "Enter 5 strings [max 80 chars]:\n";
	for (int i = 0; i < 5; i++)
	{
		cout << "String #" << i + 1 << ": ";
		cin.getline(str[i], 80);
	}
	char *cp = maxn(str, 5);
	cout << "The longest string is: " << cp << endl;
	return 0;
}

template <typename T>
T maxn(T arr[], int ct)
{
	T max = arr[0];
	for (int i = 1; i < ct; i++)
		if (arr[i] > max)
			max = arr[i];
	return max;
}

char* maxn(char* str[], int ct)
{
	char* max = str[0];
	for (int i = 1; i < ct; i++)
		if (strlen(str[1]) > strlen(max))
			max = str[i];
	return max;
}

However, in the original quiz I'm required to use specialization, can anyone please point to what I did do wrong in the first instance of code?

Thanks all for your help.