c++模版编程问题，求解救

请看代码，感觉不是很难理解，但是出错信息令我头都昏了。

#include <iostream>

#include <deque>

using namespace std;

template <class T>

class Stack

{

	private:

	deque<T> elems;

	public:

	Stack();

	Stack(int n);

	Stack(const Stack<T>&);

	void push(const T&);

	void pop();

	T top()const;

	bool isEmpty()const

	{

		return elems.empty();

	}

	template <class T2>

	Stack<T>& operator= (const Stack<T2>&);

};

	template <class T>

	Stack<T>::Stack()

	{

		;

	}

	

	template <class T>

	Stack<T>::Stack(int n)

	{

		elems = *(new deque<T>(n,0));

	}

	template <class T>

	Stack<T>:: Stack(const Stack<T>& another)

	{

		this->elems = *new deque<T>(another);

	}

 template <class T>

 void Stack<T>::push(const T& arg)

 {

 	elems.push_front(arg);

 }

 

 template <class T>

 void Stack<T>::pop()

 {

 	elems.pop_front();

 }

 template <class T>

 T Stack<T>::top()const

 {

 	return elems.front();

 }

 

 template <class T>

 	template <class T2>

 Stack<T>& Stack<T>::operator=(const Stack<T2>& operand2)

 {

 	if((void*)this == (void*)&operand2)

 	 {

 	 	return *this;

 	 }

 	 Stack<T2> tmp(operand2);

 	 elems.clear();

 	 while(tmp.isEmpty() == false)

 	 {

 	 	this->push(tmp.top());

 	 	tmp.pop();

 	 }

 	 return *this;

 }

 

 template <class T>

 void fillStack(Stack<T>& s, T* begin,T* end )

 {

 	for(T* p = begin; p != end; p++)

 	{

 		s.push(*p);

 	}

 }

 

 template <class T>

 void print(const Stack<T>& s )

 {

 		while(!s.isEmpty())

 		{

 			cout<<s.top()<<" ";

 			s.pop();

 		}

 		cout<<endl;

 }

int main(int argc, char *argv[])

{

	typedef int IntegerArray[];

	typedef float FloatArray[];

	IntegerArray a = {1,2,3,40}; 

	FloatArray b = {11.1,22.3,33.24,44.15,50.25};

	Stack<int> intStack;

	Stack<float> floatStack;

	int  a_len = sizeof(a)/sizeof(int);

	int b_len = sizeof(b)/sizeof(int);

	fillStack<int>(intStack,a,a+a_len);

		cout<<"Initial int stack:";

		print<int>(intStack);

		

		

		

	fillStack<float>(floatStack,b,b+b_len);

	cout<<"Initial float stack:";

	print<float>(floatStack);

	

	intStack = floatStack;

	cout<<"after assignment,int stack:", print<int>(intStack);

	cout<<"after assignment,float stack:",print<float>(floatStack);



	//print();

		

	return 0;

}

下面是我的出错信息

--------------------配置: MinGW3.4.5 - CUI Debug, 编译器类型: MinGW--------------------

正在编译 C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp...
[Error] C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp:105: instantiated from here
[Error] C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp:89: error: passing `const Stack<int>' as `this' argument of `void Stack<T>::pop() [with T = int]' discards qualifiers
[Error] C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp:111: instantiated from here
[Error] C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp:89: error: passing `const Stack<float>' as `this' argument of `void Stack<T>::pop() [with T = float]' discards qualifiers
[Error] C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp:113: instantiated from here
[Warning] C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp:68: warning: passing `float' for converting 1 of `void Stack<T>::push(const T&) [with T = int]'
[Error] C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp:64: instantiated from `Stack<T>& Stack<T>::operator=(const Stack<T2>&) [with T2 = float, T = int]'
[Error] C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp:113: instantiated from here
[Error] C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp:37: error: no matching function for call to `std::deque<float, std::allocator<float> >::deque(const Stack<float>&)'
[Error] C:\PROGRA~1\C-FREE~1\mingw32\include\C__~1\342EBD~1.5\bits\stl_deque.h:670: note: candidates are: std::deque<_Tp, _Alloc>::deque(const std::deque<_Tp, _Alloc>&) [with _Tp = float, _Alloc = std::allocator<float>]
[Error] C:\PROGRA~1\C-FREE~1\mingw32\include\C__~1\342EBD~1.5\bits\stl_deque.h:659: note: std::deque<_Tp, _Alloc>::deque(size_t) [with _Tp = float, _Alloc = std::allocator<float>]
[Error] C:\PROGRA~1\C-FREE~1\mingw32\include\C__~1\342EBD~1.5\bits\stl_deque.h:647: note: std::deque<_Tp, _Alloc>::deque(size_t, const _Tp&, const typename std::_Deque_base<_Tp, _Alloc>::allocator_type&) [with _Tp = float, _Alloc = std::allocator<float>]
[Error] C:\PROGRA~1\C-FREE~1\mingw32\include\C__~1\342EBD~1.5\bits\stl_deque.h:636: note: std::deque<_Tp, _Alloc>::deque(const typename std::_Deque_base<_Tp, _Alloc>::allocator_type&) [with _Tp = float, _Alloc = std::allocator<float>]

编译中止 C:\Documents and Settings\eb\桌面\templateClassAssignment.cpp: 12 个错误, 1 个警告
感觉红色那句错了真是很难理解，其他的不是很明白。请大侠不吝指教。