///////////////////////////
// //
// 堆栈数据结构 stack.h //
// //
//////////////////////////
#include<iostream.h>
template<class Type>class Stack;
template<class Type>
class StackNode
{
friend class Stack<Type>;
private:
Type data;
StackNode<Type> *link;
StackNode(Type D=0,StackNode<Type> *L=NULL):link(L),data(D){}
};
template<class Type>
class Stack
{
public:
Stack():top(NULL),NumItem(0){}
void Push(Type item);
Type Pop();
Type GetTop();
void MakeEmpty();
bool ISEmpty();
int GetNum();
private:
int NumItem;
StackNode<Type> *top;
};
template<class Type>
void Stack<Type>::Push(Type item)
{
top=new StackNode<Type>(item,top);
NumItem++;
}
template<class Type>
Type Stack<Type>::Pop()
{
StackNode<Type> *p;
Type temp;
temp=top->data;
p=top;
top=top->link;
delete p;
NumItem--;
return temp;
}
template<class Type>
Type Stack<Type>::GetTop()
{
return top->data;
}
template<class Type>
bool Stack<Type>::ISEmpty()
{
return top==NULL;
}
template<class Type>
void Stack<Type>::MakeEmpty()
{
delete top;
}
template<class Type>
int Stack<Type>::GetNum()
{
return NumItem;
}