[转载]C++堆栈的入门学习

申明：   转自    http://www.cnblogs.com/pengshao/archive/2011/12/26/2301461.html

头文件stackDemo.h

#pragma once//常用C++杂注，头文件最开始加入，能够保证头文件只被编译一次
typedef int DataType;
const int MaxStatckSize = 50; //定义栈的大小 
class StackDemo
{
public:
    //析构造函数
    StackDemo(void);
    ~StackDemo(void);

    //压栈出栈操作
    void Push( DataType item);
    DataType Pop(void);
    void ClearStack(void);

    //访问栈顶,返回栈顶当前下标
    DataType Peek(void)const;

    //检测椎栈
    bool isEmpty(void)const;
    bool isFull(void)const;

private:
    DataType stacklist[MaxStatckSize];
    int tos;//栈顶
};

实现 stackDemo.cpp

#include "StackDemo.h"
#include <iostream>
using namespace std;
StackDemo::StackDemo(void)
{
    this->tos = -1;
}
StackDemo::~StackDemo(void)
{
    this->tos = -1;
}
void StackDemo::Push( DataType item)
{
    //栈是否已满
    if (!isFull())
    {
        tos++;
        this->stacklist[tos] = item;

    }
    else
        cout << "Out of the Stack!" << endl;
}

DataType StackDemo::Pop(void)
{
    if (!isEmpty())
    {
        int ebp = tos;
        tos --;
        return stacklist[ebp];
    }
    else
        return -1;
}

DataType StackDemo::Peek(void)const
{
    return tos;
}

void StackDemo::ClearStack()
{
    for (int i = tos; i >= 0; i--)
        stacklist[i] = 0;
    tos = -1;
    cout << "Clear stack done!" << endl;
}

bool StackDemo::isFull(void)const
{
    return tos > MaxStatckSize ? true : false;
}

bool StackDemo::isEmpty(void)const
{
    return tos < 0 ? true : false;
}

main.cpp

#include <iostream>
#include "StackDemo.h"
using namespace std;
 
int main()
{
    StackDemo *sd = new StackDemo();
    sd->Push(10);//压栈
    sd->Push(20);//压栈
    sd->Push(30);//压栈
    cout << "Stack TOP:" << sd->Peek() << endl;
    for(int i=0;i<3;i++)
    cout << "POP:" << sd->Pop() << endl;

    cout << "Stack TOP:" << sd->Peek() << endl;

    return 0;
 
}