C++——用类模板实现栈

 

#include <iostream>
#include <assert.h>

using namespace std;

//用类模板实现栈
template<typename T>
class Stack
{
private:
	T *_data;
	int _size;
	int _top;
	
public:
	void Push(T val);     //入栈 
	bool Pop();           //出栈 
	T getTop(int *res);   //取栈顶元素 
	bool isFull();        //判满 
	bool isEmpty();       //判空 
	void Expand() ;       //扩容 
	void Show();          //打印

	Stack(int resize = 2)                         //构造函数
	{
		cout << "Stack(int resize = 2)" << endl;
		_data = new T[resize];
		assert(_data != NULL);

		_size = resize;
		_top = 0;
	}

	//template<typename U>
	//Stack<T>(const Stack<U>& src)  
	Stack(const Stack& stack)                     //拷贝构造函数
	{
		cout << "Stack(const Stack& stack)" << endl;
		_data = new T[stack._size];
		assert(_data != NULL);

		for(int i = 0; i < stack._top; i++)
		{
			_data[i] = stack._data[i];
		}
		_size = st