C++ 简单实现压栈出栈

/**********************************************************************
 * Copyright (c)2015,WK Studios
 * Filename:  stack.h
 * Compiler: GCC,VS,VC6.0  win32
 * Author:WK
 * Time: 2015 3 29
 ************************************************************************/
#include<iostream>
using namespace std;

const int SIZE=10;

class Stack
{
private:
    int stck[SIZE];//数组用于存放栈中数据
    int tos;       //栈顶位置（数组的下标）

public:
	Stack();
	void push(int ch); //函数声明向栈中中压入数据fuction
    int  pop();       //声明从堆栈中弹出数据fuction
	void ShowStack(); //声明显示堆栈数据function

};

/**********************************************************************
 * Copyright (c)2015,WK Studios
 * Filename:  stack.cpp
 * Compiler: GCC,VS,VC6.0  win32
 * Author:WK
 * Time: 2015 3 29
 ************************************************************************/
#include"stack.h"
    //构造函数,初始化栈的实现
Stack::Stack()
{

   tos=0;
   stck[SIZE]=0;
}
   //向栈中压入数据函数的实现
void Stack::push(int ch)
{
   if(tos==SIZE)
   {
      cout<<"Stack is full!\n";
	  return ;
   }
   stck[tos]=ch;
   tos++;
   cout<<"You have pushed a data into the Stack!\n";
}

  //从栈中弹出数据函数的实现
int Stack::pop()
{
   if(0==tos)
   {
     cout<<"Stack is empty!\n";
	 return 0;

   }
  tos--;
  return stck[tos];
}

//显示栈中数据的函数的实现
void Stack::ShowStack()
{
  cout<<"The content of Stack:\n";
	  if(0==tos)
	  {
	    cout<<"The Stack has no data!\n";
		return ;
	  }
  for(int i=tos-1;i>=0;i--)
  {
    cout<<stck[i]<<' ';

  }
   cout<<'\n';
}

/**********************************************************************
 * Copyright (c)2015,WK Studios
 * Filename:   main.cpp
 * Compiler: GCC,VS,VC6.0  win32
 * Author:WK
 * Time: 2015 3 29
 ************************************************************************/
#include"stack.h"

int main()
{
  cout<<endl;//换行的同时刷新缓冲区
  Stack ss;  //定义对象
  int x=0;
  char ch;
  cout<<"  <I>----- push data    to   Stack!\n";
  cout<<"  <O>----- pop  data    from Stack!\n";
  cout<<"  <S>----- show content of Stack!\n";
  cout<<"  <Q>----- Quit !!!!!!!\n";
  while(1)
  {

    cout<<"Please select an item:";
	cin>>ch;
	ch=toupper(ch);

	switch(ch)
	{
	case 'I':
		cout<<"Enter the value that you want to push:";
		cin>>x;
		ss.push(ch);
		break;

	case 'O':
		x=ss.pop();
		cout<<"pop "<<x<<" from Stack!\n";
		break;
	case 'S':
		ss.ShowStack();
		break;
    case 'Q':
		return 0;
		break;

	default :
		cout<<"You have iputted a wrong item!!!! Please try again !\n";
     continue;
	}

  }

}