双栈结构

一 代码结构

二 代码详解

1. doublestack.h

/*************************************************************************
    > File Name: doublestack.h
    > Author: wangzhicheng
    > Mail: [email protected]
    > Created Time: Mon 16 Feb 2015 10:35:07 AM WST
 ************************************************************************/
#ifndef DOUBLESTACK_H
#define DOUBLESTACK_H
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <iostream>
#include <memory>
using namespace std;

template<class T>
class Double_stack {
	private:
		int top0;
		int top1;
		const int n;
		T *array;
	public:
		Double_stack();
		bool empty() const;
		bool full() const;
		bool push(const T&);
		bool pop(T &);
		~Double_stack();
};

#endif

2. doublestack.cpp

/*************************************************************************
    > File Name: doublestack.cpp
    > Author: wangzhicheng
    > Mail: [email protected]
    > Created Time: Mon 16 Feb 2015 09:53:20 PM WST
 ************************************************************************/

#include "doublestack.h"
template<class T>
Double_stack<T>::Double_stack():n(1024) {
	this->top0 = -1;
	this->top1 = n;
	this->array = new T(n);
	if(!this->array) {
		cerr << "memory lack...!" << endl;
		exit(EXIT_FAILURE);
	}
}
template<class T>
bool Double_stack<T>::empty() const {
	return this->top0 == -1 && this->top1 == n;
}
template<class T>
bool Double_stack<T>::full() const {
	return this->top0 + 1 == this->top1;
}
template<class T>
bool Double_stack<T>::push(const T& m) {
	if(this->full()) {
		cerr << "the stack is full...!" << endl;
		exit(EXIT_FAILURE);
	}
	static int choice;
	if(!choice) {
		this->top0++;
		this->array[top0] = m;
	}
	else {
		this->top1--;
		this->array[top1] = m;
	}
	choice = (choice + 1) & 1;
}
template<class T>
bool Double_stack<T>::pop(T& m) {
	if(this->empty()) {
		cerr << "the stack is empty...!" << endl;
		exit(EXIT_FAILURE);
	}
	static int choice;
	if(!choice) {
		m = this->array[top0];
		this->top0--;
	}
	else {
		m = this->array[top1];
		this->top1++;
	}
	choice = (choice + 1) & 1;
}
template<class T>
Double_stack<T>::~Double_stack() {
	delete this->array;
	this->top0 = -1;
	this->top1 = n;
}

3. main.cpp

/*************************************************************************
    > File Name: main.cpp
    > Author: wangzhicheng
    > Mail: [email protected]
    > Created Time: Mon 16 Feb 2015 10:20:01 PM WST
 ************************************************************************/
#include "doublestack.cpp"
int main() {
	Double_stack<int>doublestack;
	doublestack.push(1);
	doublestack.push(2);
	doublestack.push(3);
	int m;
	doublestack.pop(m);
	cout << m << endl;

	return 0;
}

4. makefile

CC=g++
all:
	$(CC) -g -o main main.cpp doublestack.cpp doublestack.h

三 程序运行截图