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#ifndef STACK_H
#define STACK_H
//const int maxSize = 50;
template<class T>
class Stack
{
public:
Stack(){} //构造函数
virtual void Push(const T& x) = 0; //新元素x进栈
virtual bool Pop(T& x) = 0 ; //栈顶元素出栈，由x返回
virtual bool getTop(T& x) = 0; //读取栈顶元素，由x返回
virtual bool IsEmpty()const = 0; //判断栈空否
virtual bool IsFull()const = 0; //判断栈满否
virtual int getSize() = 0; //计算栈中元素个数
};
#endif
