數據結構----鏈表隊列

利用C++ 單向鏈表實現數據結構隊列，其實和上一篇基本內容相同，僅僅是插入的時候在鏈表的尾部插入，取元素都是一樣的，都從頭部取。

#pragma once  
 
#include "stdio.h"  
//利用鏈表來實現隊列，先進先出  
 
class queue 
{ 
public: 
    queue(void); 
    queue(int value); 
    ~queue(void); 
private: 
    int m_value; 
    queue* m_pnext; 
public: 
    void push(int value); 
    bool pop(int *value); 
    bool top(int *value); 
    bool empty(); 
    int size(); 
    void output(); 
    void destroy(); 
}; 
 
#include "stdafx.h"  
#include "queue.h"  
 
 
//構造一個空的隊列頭指針  
queue::queue(void) 
{ 
    m_value = 0x00; 
    m_pnext = NULL; 
} 
 
//構建一個隊列結點  
queue::queue(int value) 
{ 
    m_value = value; 
    m_pnext = NULL; 
} 
 
//輸出被刪除掉的結點  
queue::~queue(void) 
{ 
    printf("destroy node its value=%d\n", m_value); 
} 
 
//元素入隊列  
void queue::push(int value) 
{ 
    queue *pnode = this; 
    while(pnode->m_pnext != NULL) 
    { 
        pnode = pnode->m_pnext; 
    } 
    queue *newnode = new queue(value); 
    pnode->m_pnext = newnode; 
    m_value++; 
} 
 
 
//元素出隊列  
bool queue::pop(int *value) 
{ 
    bool result = false; 
    if (m_pnext != NULL) 
    { 
        *value = m_pnext->m_value; 
        m_pnext = m_pnext->m_pnext; 
        result = true; 
        m_value--; 
    } 
    return result; 
} 
 
//得到隊列頂部的元素  
bool queue::top(int *value) 
{ 
    bool result = false; 
    if (m_pnext != NULL) 
    { 
        *value = m_pnext->m_value; 
        result = true; 
    } 
    return result; 
} 
 
//判斷隊列是否為空  
bool queue::empty() 
{ 
    bool result = false; 
    if (m_pnext == NULL) 
    { 
        result = true; 
    } 
    return result; 
} 
 
//得到隊列大小  
int queue::size() 
{ 
    return m_value; 
} 
 
 
//輸出隊列中的元素  
void queue::output() 
{ 
    queue* pnode = this; 
    while(pnode->m_pnext != NULL) 
    { 
        printf("index=%d\n", pnode->m_pnext->m_value); 
        pnode = pnode->m_pnext; 
 
    } 
} 
 
//銷毀隊列  
void queue::destroy() 
{ 
    while(m_pnext != NULL)  
    { 
        queue* pnode = m_pnext; 
        m_pnext = m_pnext->m_pnext; 
        delete pnode; 
    } 
} 

#pragma once

#include "stdio.h"
//利用鏈表來實現隊列，先進先出

class queue
{
public:
 queue(void);
 queue(int value);
 ~queue(void);
private:
 int m_value;
 queue* m_pnext;
public:
 void push(int value);
 bool pop(int *value);
 bool top(int *value);
 bool empty();
 int size();
 void output();
 void destroy();
};

#include "stdafx.h"
#include "queue.h"


//構造一個空的隊列頭指針
queue::queue(void)
{
 m_value = 0x00;
 m_pnext = NULL;
}

//構建一個隊列結點
queue::queue(int value)
{
 m_value = value;
 m_pnext = NULL;
}

//輸出被刪除掉的結點
queue::~queue(void)
{
 printf("destroy node its value=%d\n", m_value);
}

//元素入隊列
void queue::push(int value)
{
 queue *pnode = this;
 while(pnode->m_pnext != NULL)
 {
  pnode = pnode->m_pnext;
 }
 queue *newnode = new queue(value);
 pnode->m_pnext = newnode;
 m_value++;
}


//元素出隊列
bool queue::pop(int *value)
{
 bool result = false;
 if (m_pnext != NULL)
 {
  *value = m_pnext->m_value;
  m_pnext = m_pnext->m_pnext;
  result = true;
  m_value--;
 }
 return result;
}

//得到隊列頂部的元素
bool queue::top(int *value)
{
 bool result = false;
 if (m_pnext != NULL)
 {
  *value = m_pnext->m_value;
  result = true;
 }
 return result;
}

//判斷隊列是否為空
bool queue::empty()
{
 bool result = false;
 if (m_pnext == NULL)
 {
  result = true;
 }
 return result;
}

//得到隊列大小
int queue::size()
{
 return m_value;
}


//輸出隊列中的元素
void queue::output()
{
 queue* pnode = this;
 while(pnode->m_pnext != NULL)
 {
  printf("index=%d\n", pnode->m_pnext->m_value);
  pnode = pnode->m_pnext;

 }
}

//銷毀隊列
void queue::destroy()
{
 while(m_pnext != NULL)
 {
  queue* pnode = m_pnext;
  m_pnext = m_pnext->m_pnext;
  delete pnode;
 }
}

主程序測試

// myqueue.cpp : Defines the entry point for the console application.  
//  
 
#include "stdafx.h"  
#include "queue.h"  
 
int _tmain(int argc, _TCHAR* argv[]) 
{ 
    queue myqueue; 
    for(int i=0; i<10; i++) 
    { 
        myqueue.push(i * 10); 
    } 
 
    myqueue.output(); 
    printf("queue size=%d\n", myqueue.size()); 
 
    if (myqueue.empty()) 
    { 
        printf("queue is empty\n"); 
    } 
    else  
    { 
        printf("queue is not empty\n"); 
    } 
 
    myqueue.destroy(); 
 
    int value = 0; 
    for(int i=0; i<10; i++) 
    { 
        if (myqueue.pop(&value)) 
        { 
            printf("pop value=%d successfully\n", value); 
        } 
        else 
        { 
            printf("pop unsuccessfully\n"); 
        } 
    } 
 
    printf("queue size=%d\n", myqueue.size()); 
 
    if (myqueue.empty()) 
    { 
        printf("queue is empty\n"); 
    } 
    else  
    { 
        printf("queue is not empty\n"); 
    } 
 
    getchar(); 
    return 0; 
} 

// myqueue.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "queue.h"

int _tmain(int argc, _TCHAR* argv[])
{
 queue myqueue;
 for(int i=0; i<10; i++)
 {
  myqueue.push(i * 10);
 }

 myqueue.output();
 printf("queue size=%d\n", myqueue.size());

 if (myqueue.empty())
 {
  printf("queue is empty\n");
 }
 else
 {
  printf("queue is not empty\n");
 }

 myqueue.destroy();

 int value = 0;
 for(int i=0; i<10; i++)
 {
  if (myqueue.pop(&value))
  {
   printf("pop value=%d successfully\n", value);
  }
  else
  {
   printf("pop unsuccessfully\n");
  }
 }

 printf("queue size=%d\n", myqueue.size());

 if (myqueue.empty())
 {
  printf("queue is empty\n");
 }
 else
 {
  printf("queue is not empty\n");
 }

 getchar();
 return 0;
}