mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-25 01:56:30 +08:00
Fix array queue.
This commit is contained in:
parent
658ad90377
commit
5eae708035
15 changed files with 425 additions and 365 deletions
8
codes/c/.gitignore
vendored
Normal file
8
codes/c/.gitignore
vendored
Normal file
|
@ -0,0 +1,8 @@
|
|||
# Ignore all
|
||||
*
|
||||
# Unignore all with extensions
|
||||
!*.*
|
||||
# Unignore all dirs
|
||||
!*/
|
||||
|
||||
*.dSYM/
|
|
@ -9,9 +9,9 @@
|
|||
/* 基于环形数组形成的队列 */
|
||||
struct ArrayQueue {
|
||||
int *nums; // 用于存储队列元素的数组
|
||||
int cap; // 队列容量
|
||||
int front; // 头指针,指向队首
|
||||
int rear; // 尾指针,指向队尾 + 1
|
||||
int front; // 队首指针,指向队首元素
|
||||
int queSize; // 尾指针,指向队尾 + 1
|
||||
int queCapacity; // 队列容量
|
||||
};
|
||||
|
||||
typedef struct ArrayQueue ArrayQueue;
|
||||
|
@ -20,33 +20,31 @@ typedef struct ArrayQueue ArrayQueue;
|
|||
ArrayQueue *newArrayQueue(int capacity) {
|
||||
ArrayQueue *queue = (ArrayQueue *) malloc(sizeof(ArrayQueue));
|
||||
// 初始化数组
|
||||
queue->cap = capacity;
|
||||
queue->nums = (int *) malloc(sizeof(int) * queue->cap);
|
||||
queue->front = 0;
|
||||
queue->rear = 0;
|
||||
queue->queCapacity = capacity;
|
||||
queue->nums = (int *) malloc(sizeof(int) * queue->queCapacity);
|
||||
queue->front = queue->queSize = 0;
|
||||
return queue;
|
||||
}
|
||||
|
||||
/* 析构函数 */
|
||||
void delArrayQueue(ArrayQueue *queue) {
|
||||
free(queue->nums);
|
||||
queue->cap = 0;
|
||||
queue->queCapacity = 0;
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
int capacity(ArrayQueue *queue) {
|
||||
return queue->cap;
|
||||
return queue->queCapacity;
|
||||
}
|
||||
|
||||
/* 获取队列的长度 */
|
||||
int size(ArrayQueue *queue) {
|
||||
// 由于将数组看作环形队列,可能 rear < front,因此需要取余数
|
||||
return (capacity(queue) + queue->rear - queue->front) % capacity(queue);
|
||||
return queue->queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
bool empty(ArrayQueue *queue) {
|
||||
return queue->rear - queue->front == 0;
|
||||
return queue->queSize == 0;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
|
@ -61,26 +59,30 @@ void offer(ArrayQueue *queue, int num) {
|
|||
printf("队列已满\r\n");
|
||||
return;
|
||||
}
|
||||
queue->nums[queue->rear] = num;
|
||||
queue->rear = (queue->rear + 1) % capacity(queue);
|
||||
// 计算队尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
int rear = (queue->front + queue->queSize) % queue->queCapacity;
|
||||
// 尾结点后添加 num
|
||||
queue->nums[rear] = num;
|
||||
queue->queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
void poll(ArrayQueue *queue) {
|
||||
int num = peek(queue);
|
||||
queue->front = (queue->front + 1) % capacity(queue);
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
queue->front = (queue->front + 1) % queue->queCapacity;
|
||||
queue->queSize--;
|
||||
}
|
||||
|
||||
/* 打印基于环形数组形成的队列 */
|
||||
void printArrayQueue(ArrayQueue *queue) {
|
||||
int siz = size(queue);
|
||||
int cap = capacity(queue);
|
||||
int arr[siz];
|
||||
int arr[queue->queSize];
|
||||
// 拷贝
|
||||
for (int i = 0, j = queue->front; i < siz; i++, j++) {
|
||||
arr[i] = queue->nums[j % cap];
|
||||
for (int i = 0, j = queue->front; i < queue->queSize; i++, j++) {
|
||||
arr[i] = queue->nums[j % queue->queCapacity];
|
||||
}
|
||||
printArray(arr, siz);
|
||||
printArray(arr, queue->queSize);
|
||||
}
|
||||
|
||||
|
||||
|
|
|
@ -10,15 +10,16 @@
|
|||
class ArrayQueue {
|
||||
private:
|
||||
int *nums; // 用于存储队列元素的数组
|
||||
int cap; // 队列容量
|
||||
int front = 0; // 头指针,指向队首
|
||||
int rear = 0; // 尾指针,指向队尾 + 1
|
||||
int front; // 队首指针,指向队首元素
|
||||
int queSize; // 队列长度
|
||||
int queCapacity; // 队列容量
|
||||
|
||||
public:
|
||||
ArrayQueue(int capacity) {
|
||||
// 初始化数组
|
||||
cap = capacity;
|
||||
nums = new int[capacity];
|
||||
queCapacity = capacity;
|
||||
front = queSize = 0;
|
||||
}
|
||||
|
||||
~ArrayQueue() {
|
||||
|
@ -27,37 +28,39 @@ public:
|
|||
|
||||
/* 获取队列的容量 */
|
||||
int capacity() {
|
||||
return cap;
|
||||
return queCapacity;
|
||||
}
|
||||
|
||||
/* 获取队列的长度 */
|
||||
int size() {
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (capacity() + rear - front) % capacity();
|
||||
return queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
bool empty() {
|
||||
return rear - front == 0;
|
||||
return size() == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
void offer(int num) {
|
||||
if (size() == capacity()) {
|
||||
if (queSize == queCapacity) {
|
||||
cout << "队列已满" << endl;
|
||||
return;
|
||||
}
|
||||
// 计算队尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
int rear = (front + queSize) % queCapacity;
|
||||
// 尾结点后添加 num
|
||||
nums[rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
rear = (rear + 1) % capacity();
|
||||
queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
void poll() {
|
||||
int num = peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity();
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % queCapacity;
|
||||
queSize--;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
|
@ -69,11 +72,10 @@ public:
|
|||
|
||||
/* 将数组转化为 Vector 并返回 */
|
||||
vector<int> toVector() {
|
||||
int siz = size();
|
||||
int cap = capacity();
|
||||
int cap = queCapacity;
|
||||
// 仅转换有效长度范围内的列表元素
|
||||
vector<int> arr(siz);
|
||||
for (int i = 0, j = front; i < siz; i++, j++) {
|
||||
vector<int> arr(queSize);
|
||||
for (int i = 0, j = front; i < queSize; i++, j++) {
|
||||
arr[i] = nums[j % cap];
|
||||
}
|
||||
return arr;
|
||||
|
|
|
@ -13,13 +13,13 @@ namespace hello_algo.chapter_stack_and_queue
|
|||
class ArrayQueue
|
||||
{
|
||||
private int[] nums; // 用于存储队列元素的数组
|
||||
private int front = 0; // 头指针,指向队首
|
||||
private int rear = 0; // 尾指针,指向队尾 + 1
|
||||
private int front; // 队首指针,指向队首元素
|
||||
private int queSize; // 队列长度
|
||||
|
||||
public ArrayQueue(int capacity)
|
||||
{
|
||||
// 初始化数组
|
||||
nums = new int[capacity];
|
||||
front = queSize = 0;
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
|
@ -31,37 +31,38 @@ namespace hello_algo.chapter_stack_and_queue
|
|||
/* 获取队列的长度 */
|
||||
public int size()
|
||||
{
|
||||
int capacity = this.capacity();
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (capacity + rear - front) % capacity;
|
||||
return queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
public bool isEmpty()
|
||||
{
|
||||
return rear - front == 0;
|
||||
return queSize == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
public void offer(int num)
|
||||
{
|
||||
if (size() == capacity())
|
||||
if (queSize == capacity())
|
||||
{
|
||||
Console.WriteLine("队列已满");
|
||||
return;
|
||||
}
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
int rear = (front + queSize) % capacity();
|
||||
// 尾结点后添加 num
|
||||
nums[rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
rear = (rear + 1) % capacity();
|
||||
queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
public int poll()
|
||||
{
|
||||
int num = peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity();
|
||||
queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
|
@ -76,13 +77,11 @@ namespace hello_algo.chapter_stack_and_queue
|
|||
/* 返回数组 */
|
||||
public int[] toArray()
|
||||
{
|
||||
int size = this.size();
|
||||
int capacity = this.capacity();
|
||||
// 仅转换有效长度范围内的列表元素
|
||||
int[] res = new int[size];
|
||||
for (int i = 0, j = front; i < size; i++, j++)
|
||||
int[] res = new int[queSize];
|
||||
for (int i = 0, j = front; i < queSize; i++, j++)
|
||||
{
|
||||
res[i] = nums[j % capacity];
|
||||
res[i] = nums[j % this.capacity()];
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
|
|
@ -6,54 +6,53 @@ package chapter_stack_and_queue
|
|||
|
||||
/* 基于环形数组实现的队列 */
|
||||
type arrayQueue struct {
|
||||
data []int // 用于存储队列元素的数组
|
||||
capacity int // 队列容量(即最多容量的元素个数)
|
||||
front int // 头指针,指向队首
|
||||
rear int // 尾指针,指向队尾 + 1
|
||||
nums []int // 用于存储队列元素的数组
|
||||
front int // 队首指针,指向队首元素
|
||||
queSize int // 队列长度
|
||||
queCapacity int // 队列容量(即最大容纳元素数量)
|
||||
}
|
||||
|
||||
// newArrayQueue 基于环形数组实现的队列
|
||||
func newArrayQueue(capacity int) *arrayQueue {
|
||||
func newArrayQueue(queCapacity int) *arrayQueue {
|
||||
return &arrayQueue{
|
||||
data: make([]int, capacity),
|
||||
capacity: capacity,
|
||||
nums: make([]int, queCapacity),
|
||||
queCapacity: queCapacity,
|
||||
front: 0,
|
||||
rear: 0,
|
||||
queSize: 0,
|
||||
}
|
||||
}
|
||||
|
||||
// size 获取队列的长度
|
||||
func (q *arrayQueue) size() int {
|
||||
size := (q.capacity + q.rear - q.front) % q.capacity
|
||||
return size
|
||||
return q.queSize
|
||||
}
|
||||
|
||||
// isEmpty 判断队列是否为空
|
||||
func (q *arrayQueue) isEmpty() bool {
|
||||
return q.rear-q.front == 0
|
||||
return q.queSize == 0
|
||||
}
|
||||
|
||||
// offer 入队
|
||||
func (q *arrayQueue) offer(v int) {
|
||||
// 当 rear == capacity 表示队列已满
|
||||
if q.size() == q.capacity {
|
||||
func (q *arrayQueue) offer(num int) {
|
||||
// 当 rear == queCapacity 表示队列已满
|
||||
if q.queSize == q.queCapacity {
|
||||
return
|
||||
}
|
||||
// 尾结点后添加
|
||||
q.data[q.rear] = v
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
q.rear = (q.rear + 1) % q.capacity
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
rear := (q.front + q.queSize) % q.queCapacity
|
||||
// 尾结点后添加 num
|
||||
q.nums[rear] = num
|
||||
q.queSize++
|
||||
}
|
||||
|
||||
// poll 出队
|
||||
func (q *arrayQueue) poll() any {
|
||||
if q.isEmpty() {
|
||||
return nil
|
||||
}
|
||||
v := q.data[q.front]
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
q.front = (q.front + 1) % q.capacity
|
||||
return v
|
||||
num := q.peek()
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
q.front = (q.front + 1) % q.queCapacity
|
||||
q.queSize--
|
||||
return num
|
||||
}
|
||||
|
||||
// peek 访问队首元素
|
||||
|
@ -61,11 +60,15 @@ func (q *arrayQueue) peek() any {
|
|||
if q.isEmpty() {
|
||||
return nil
|
||||
}
|
||||
v := q.data[q.front]
|
||||
return v
|
||||
return q.nums[q.front]
|
||||
}
|
||||
|
||||
// 获取 Slice 用于打印
|
||||
func (q *arrayQueue) toSlice() []int {
|
||||
return q.data[q.front:q.rear]
|
||||
rear := (q.front + q.queSize)
|
||||
if rear >= q.queCapacity {
|
||||
rear %= q.queCapacity
|
||||
return append(q.nums[q.front:], q.nums[:rear]...)
|
||||
}
|
||||
return q.nums[q.front:rear]
|
||||
}
|
||||
|
|
|
@ -75,6 +75,14 @@ func TestArrayQueue(t *testing.T) {
|
|||
// 判断是否为空
|
||||
isEmpty := queue.isEmpty()
|
||||
fmt.Println("队是否为空 =", isEmpty)
|
||||
|
||||
/* 测试环形数组 */
|
||||
for i := 0; i < 10; i++ {
|
||||
queue.offer(i)
|
||||
queue.poll()
|
||||
fmt.Print("第", i, "轮入队 + 出队后 queue =")
|
||||
PrintSlice(queue.toSlice())
|
||||
}
|
||||
}
|
||||
|
||||
func TestLinkedListQueue(t *testing.T) {
|
||||
|
|
|
@ -11,12 +11,12 @@ import java.util.*;
|
|||
/* 基于环形数组实现的队列 */
|
||||
class ArrayQueue {
|
||||
private int[] nums; // 用于存储队列元素的数组
|
||||
private int front = 0; // 头指针,指向队首
|
||||
private int rear = 0; // 尾指针,指向队尾 + 1
|
||||
private int front; // 队首指针,指向队首元素
|
||||
private int queSize; // 队列长度
|
||||
|
||||
public ArrayQueue(int capacity) {
|
||||
// 初始化数组
|
||||
nums = new int[capacity];
|
||||
front = queSize = 0;
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
|
@ -26,33 +26,34 @@ class ArrayQueue {
|
|||
|
||||
/* 获取队列的长度 */
|
||||
public int size() {
|
||||
int capacity = capacity();
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (capacity + rear - front) % capacity;
|
||||
return queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
public boolean isEmpty() {
|
||||
return rear - front == 0;
|
||||
return queSize == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
public void offer(int num) {
|
||||
if (size() == capacity()) {
|
||||
if (queSize == capacity()) {
|
||||
System.out.println("队列已满");
|
||||
return;
|
||||
}
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
int rear = (front + queSize) % capacity();
|
||||
// 尾结点后添加 num
|
||||
nums[rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
rear = (rear + 1) % capacity();
|
||||
queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
public int poll() {
|
||||
int num = peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity();
|
||||
queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
|
@ -65,12 +66,10 @@ class ArrayQueue {
|
|||
|
||||
/* 返回数组 */
|
||||
public int[] toArray() {
|
||||
int size = size();
|
||||
int capacity = capacity();
|
||||
// 仅转换有效长度范围内的列表元素
|
||||
int[] res = new int[size];
|
||||
for (int i = 0, j = front; i < size; i++, j++) {
|
||||
res[i] = nums[j % capacity];
|
||||
int[] res = new int[queSize];
|
||||
for (int i = 0, j = front; i < queSize; i++, j++) {
|
||||
res[i] = nums[j % capacity()];
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
|
|
@ -4,48 +4,49 @@
|
|||
* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
|
||||
*/
|
||||
|
||||
|
||||
/* 基于环形数组实现的队列 */
|
||||
class ArrayQueue {
|
||||
#queue; // 用于存储队列元素的数组
|
||||
#front = 0; // 头指针,指向队首
|
||||
#rear = 0; // 尾指针,指向队尾 + 1
|
||||
#nums; // 用于存储队列元素的数组
|
||||
#front = 0; // 队首指针,指向队首元素
|
||||
#queSize = 0; // 队列长度
|
||||
|
||||
constructor(capacity) {
|
||||
this.#queue = new Array(capacity);
|
||||
this.#nums = new Array(capacity);
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
get capacity() {
|
||||
return this.#queue.length;
|
||||
return this.#nums.length;
|
||||
}
|
||||
|
||||
/* 获取队列的长度 */
|
||||
get size() {
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (this.capacity + this.#rear - this.#front) % this.capacity;
|
||||
return this.#queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
empty() {
|
||||
return this.#rear - this.#front == 0;
|
||||
return this.#queSize == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
offer(num) {
|
||||
if (this.size == this.capacity)
|
||||
throw new Error("队列已满");
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
const rear = (this.#front + this.size) % this.capacity;
|
||||
// 尾结点后添加 num
|
||||
this.#queue[this.#rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
this.#rear = (this.#rear + 1) % this.capacity;
|
||||
this.#nums[rear] = num;
|
||||
this.#queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
poll() {
|
||||
const num = this.peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
this.#front = (this.#front + 1) % this.capacity;
|
||||
this.#queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
|
@ -53,17 +54,15 @@ class ArrayQueue {
|
|||
peek() {
|
||||
if (this.empty())
|
||||
throw new Error("队列为空");
|
||||
return this.#queue[this.#front];
|
||||
return this.#nums[this.#front];
|
||||
}
|
||||
|
||||
/* 返回 Array */
|
||||
toArray() {
|
||||
const siz = this.size;
|
||||
const cap = this.capacity;
|
||||
// 仅转换有效长度范围内的列表元素
|
||||
const arr = new Array(siz);
|
||||
for (let i = 0, j = this.#front; i < siz; i++, j++) {
|
||||
arr[i] = this.#queue[j % cap];
|
||||
const arr = new Array(this.size);
|
||||
for (let i = 0, j = this.#front; i < this.size; i++, j++) {
|
||||
arr[i] = this.#nums[j % this.capacity];
|
||||
}
|
||||
return arr;
|
||||
}
|
||||
|
@ -81,8 +80,7 @@ queue.offer(3);
|
|||
queue.offer(2);
|
||||
queue.offer(5);
|
||||
queue.offer(4);
|
||||
console.log("队列 queue = ");
|
||||
console.log(queue.toArray());
|
||||
console.log("队列 queue =", queue.toArray());
|
||||
|
||||
/* 访问队首元素 */
|
||||
const peek = queue.peek();
|
||||
|
@ -90,8 +88,7 @@ console.log("队首元素 peek = " + peek);
|
|||
|
||||
/* 元素出队 */
|
||||
const poll = queue.poll();
|
||||
console.log("出队元素 poll = " + poll + ",出队后 queue = ");
|
||||
console.log(queue.toArray());
|
||||
console.log("出队元素 poll = " + poll + ",出队后 queue =", queue.toArray());
|
||||
|
||||
/* 获取队列的长度 */
|
||||
const size = queue.size;
|
||||
|
@ -105,6 +102,5 @@ console.log("队列是否为空 = " + empty);
|
|||
for (let i = 0; i < 10; i++) {
|
||||
queue.offer(i);
|
||||
queue.poll();
|
||||
console.log("第 " + i + " 轮入队 + 出队后 queue = ");
|
||||
console.log(queue.toArray());
|
||||
console.log("第 " + i + " 轮入队 + 出队后 queue =", queue.toArray());
|
||||
}
|
||||
|
|
|
@ -4,11 +4,6 @@
|
|||
* Author: IsChristina (christinaxia77@foxmail.com)
|
||||
*/
|
||||
|
||||
function Trunk(prev, str) {
|
||||
this.prev = prev;
|
||||
this.str = str;
|
||||
}
|
||||
|
||||
/**
|
||||
* Print a linked list
|
||||
* @param head
|
||||
|
@ -22,6 +17,11 @@ function printLinkedList(head) {
|
|||
console.log(list.join(" -> "));
|
||||
}
|
||||
|
||||
function Trunk(prev, str) {
|
||||
this.prev = prev;
|
||||
this.str = str;
|
||||
}
|
||||
|
||||
/**
|
||||
* The interface of the tree printer
|
||||
* This tree printer is borrowed from TECHIE DELIGHT
|
||||
|
@ -83,6 +83,6 @@ function showTrunks(p) {
|
|||
}
|
||||
|
||||
module.exports = {
|
||||
printTree,
|
||||
printLinkedList,
|
||||
printTree
|
||||
}
|
||||
|
|
|
@ -14,8 +14,8 @@ from include import *
|
|||
class ArrayQueue:
|
||||
def __init__(self, size):
|
||||
self.__nums = [0] * size # 用于存储队列元素的数组
|
||||
self.__front = 0 # 头指针,指向队首
|
||||
self.__rear = 0 # 尾指针,指向队尾 + 1
|
||||
self.__front = 0 # 队首指针,指向队首元素
|
||||
self.__size = 0 # 队列长度
|
||||
|
||||
""" 获取队列的容量 """
|
||||
def capacity(self):
|
||||
|
@ -23,35 +23,33 @@ class ArrayQueue:
|
|||
|
||||
""" 获取队列的长度 """
|
||||
def size(self):
|
||||
# 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (self.capacity() + self.__rear - self.__front) % self.capacity()
|
||||
return self.__size
|
||||
|
||||
""" 判断队列是否为空 """
|
||||
def is_empty(self):
|
||||
return (self.__rear - self.__front) == 0
|
||||
return self.__size == 0
|
||||
|
||||
""" 入队 """
|
||||
def push(self, val):
|
||||
if self.size() == self.capacity():
|
||||
print("队列已满")
|
||||
return False
|
||||
def push(self, num):
|
||||
assert self.__size < self.capacity(), "队列已满"
|
||||
# 计算尾指针,指向队尾索引 + 1
|
||||
# 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
rear = (self.__front + self.__size) % self.capacity()
|
||||
# 尾结点后添加 num
|
||||
self.__nums[self.__rear] = val
|
||||
# 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
self.__rear = (self.__rear + 1) % self.capacity()
|
||||
self.__nums[rear] = num
|
||||
self.__size += 1
|
||||
|
||||
""" 出队 """
|
||||
def poll(self):
|
||||
num = self.peek()
|
||||
# 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
# 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
self.__front = (self.__front + 1) % self.capacity()
|
||||
self.__size -= 1
|
||||
return num
|
||||
|
||||
""" 访问队首元素 """
|
||||
def peek(self):
|
||||
if self.is_empty():
|
||||
print("队列为空")
|
||||
return False
|
||||
assert not self.is_empty(), "队列为空"
|
||||
return self.__nums[self.__front]
|
||||
|
||||
""" 返回列表用于打印 """
|
||||
|
@ -93,3 +91,9 @@ if __name__ == "__main__":
|
|||
""" 判断队列是否为空 """
|
||||
is_empty = queue.is_empty()
|
||||
print("队列是否为空 =", is_empty)
|
||||
|
||||
""" 测试环形数组 """
|
||||
for i in range(10):
|
||||
queue.push(i);
|
||||
queue.poll();
|
||||
print("第", i, "轮入队 + 出队后 queue = ", queue.to_list());
|
||||
|
|
|
@ -7,8 +7,8 @@
|
|||
/* 基于环形数组实现的队列 */
|
||||
class ArrayQueue {
|
||||
private var nums: [Int] // 用于存储队列元素的数组
|
||||
private var front = 0 // 头指针,指向队首
|
||||
private var rear = 0 // 尾指针,指向队尾 + 1
|
||||
private var front = 0 // 队首指针,指向队首元素
|
||||
private var queSize = 0 // 队列长度
|
||||
|
||||
init(capacity: Int) {
|
||||
// 初始化数组
|
||||
|
@ -22,14 +22,12 @@ class ArrayQueue {
|
|||
|
||||
/* 获取队列的长度 */
|
||||
func size() -> Int {
|
||||
let capacity = capacity()
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (capacity + rear - front) % capacity
|
||||
queSize
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
func isEmpty() -> Bool {
|
||||
rear - front == 0
|
||||
queSize == 0
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
|
@ -38,19 +36,22 @@ class ArrayQueue {
|
|||
print("队列已满")
|
||||
return
|
||||
}
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
int rear = (front + queSize) % capacity();
|
||||
// 尾结点后添加 num
|
||||
nums[rear] = num
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
rear = (rear + 1) % capacity()
|
||||
nums[rear] = num;
|
||||
queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
@discardableResult
|
||||
func poll() -> Int {
|
||||
let num = peek()
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity()
|
||||
return num
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity();
|
||||
queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
|
@ -63,12 +64,10 @@ class ArrayQueue {
|
|||
|
||||
/* 返回数组 */
|
||||
func toArray() -> [Int] {
|
||||
let size = size()
|
||||
let capacity = capacity()
|
||||
// 仅转换有效长度范围内的列表元素
|
||||
var res = Array(repeating: 0, count: size)
|
||||
for (i, j) in sequence(first: (0, front), next: { $0 < size - 1 ? ($0 + 1, $1 + 1) : nil }) {
|
||||
res[i] = nums[j % capacity]
|
||||
var res = Array(repeating: 0, count: queSize)
|
||||
for (i, j) in sequence(first: (0, front), next: { $0 < queSize - 1 ? ($0 + 1, $1 + 1) : nil }) {
|
||||
res[i] = nums[j % capacity()]
|
||||
}
|
||||
return res
|
||||
}
|
||||
|
|
|
@ -4,49 +4,50 @@
|
|||
* Author: S-N-O-R-L-A-X (snorlax.xu@outlook.com)
|
||||
*/
|
||||
|
||||
|
||||
/* 基于环形数组实现的队列 */
|
||||
class ArrayQueue {
|
||||
private queue: number[]; // 用于存储队列元素的数组
|
||||
private front: number = 0; // 头指针,指向队首
|
||||
private rear: number = 0; // 尾指针,指向队尾 + 1
|
||||
private CAPACITY: number = 1e5;
|
||||
private nums: number[]; // 用于存储队列元素的数组
|
||||
private front: number; // 队首指针,指向队首元素
|
||||
private queSize: number; // 队列长度
|
||||
|
||||
constructor(capacity?: number) {
|
||||
this.queue = new Array<number>(capacity ?? this.CAPACITY);
|
||||
constructor(capacity: number) {
|
||||
this.nums = new Array<number>(capacity);
|
||||
this.front = this.queSize = 0;
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
get capacity(): number {
|
||||
return this.queue.length;
|
||||
return this.nums.length;
|
||||
}
|
||||
|
||||
/* 获取队列的长度 */
|
||||
get size(): number {
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (this.capacity + this.rear - this.front) % this.capacity;
|
||||
return this.queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
empty(): boolean {
|
||||
return this.rear - this.front == 0;
|
||||
return this.queSize == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
offer(num: number): void {
|
||||
if (this.size == this.capacity)
|
||||
throw new Error("队列已满");
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
const rear = (this.front + this.queSize) % this.capacity;
|
||||
// 尾结点后添加 num
|
||||
this.queue[this.rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
this.rear = (this.rear + 1) % this.capacity;
|
||||
this.nums[rear] = num;
|
||||
this.queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
poll(): number {
|
||||
const num = this.peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
this.front = (this.front + 1) % this.capacity;
|
||||
this.queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
|
@ -54,17 +55,15 @@ class ArrayQueue {
|
|||
peek(): number {
|
||||
if (this.empty())
|
||||
throw new Error("队列为空");
|
||||
return this.queue[this.front];
|
||||
return this.nums[this.front];
|
||||
}
|
||||
|
||||
/* 返回 Array */
|
||||
toArray(): number[] {
|
||||
const siz = this.size;
|
||||
const cap = this.capacity;
|
||||
// 仅转换有效长度范围内的列表元素
|
||||
const arr = new Array(siz);
|
||||
for (let i = 0, j = this.front; i < siz; i++, j++) {
|
||||
arr[i] = this.queue[j % cap];
|
||||
const arr = new Array(this.size);
|
||||
for (let i = 0, j = this.front; i < this.size; i++, j++) {
|
||||
arr[i] = this.nums[j % this.capacity];
|
||||
}
|
||||
return arr;
|
||||
}
|
||||
|
@ -80,8 +79,7 @@ queue.offer(3);
|
|||
queue.offer(2);
|
||||
queue.offer(5);
|
||||
queue.offer(4);
|
||||
console.log("队列 queue = ");
|
||||
console.log(queue.toArray());
|
||||
console.log("队列 queue =", queue.toArray());
|
||||
|
||||
/* 访问队首元素 */
|
||||
const peek = queue.peek();
|
||||
|
@ -89,8 +87,7 @@ console.log("队首元素 peek = " + peek);
|
|||
|
||||
/* 元素出队 */
|
||||
const poll = queue.poll();
|
||||
console.log("出队元素 poll = " + poll + ",出队后 queue = ");
|
||||
console.log(queue.toArray());
|
||||
console.log("出队元素 poll = " + poll + ",出队后 queue =", queue.toArray());
|
||||
|
||||
/* 获取队列的长度 */
|
||||
const size = queue.size;
|
||||
|
@ -104,7 +101,7 @@ console.log("队列是否为空 = " + empty);
|
|||
for (let i = 0; i < 10; i++) {
|
||||
queue.offer(i);
|
||||
queue.poll();
|
||||
console.log("第 " + i + " 轮入队 + 出队后 queue = ");
|
||||
console.log("第 " + i + " 轮入队 + 出队后 queue =", queue.toArray());
|
||||
console.log(queue.toArray());
|
||||
}
|
||||
|
||||
|
|
|
@ -7,16 +7,6 @@
|
|||
import ListNode from './ListNode';
|
||||
import { TreeNode } from './TreeNode';
|
||||
|
||||
class Trunk {
|
||||
prev: Trunk | null;
|
||||
str: string;
|
||||
|
||||
constructor(prev: Trunk | null, str: string) {
|
||||
this.prev = prev;
|
||||
this.str = str;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Print a linked list
|
||||
* @param head
|
||||
|
@ -30,6 +20,16 @@ function printLinkedList(head: ListNode | null): void {
|
|||
console.log(list.join(' -> '));
|
||||
}
|
||||
|
||||
class Trunk {
|
||||
prev: Trunk | null;
|
||||
str: string;
|
||||
|
||||
constructor(prev: Trunk | null, str: string) {
|
||||
this.prev = prev;
|
||||
this.str = str;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* The interface of the tree printer
|
||||
* This tree printer is borrowed from TECHIE DELIGHT
|
||||
|
|
|
@ -12,8 +12,8 @@ pub fn ArrayQueue(comptime T: type) type {
|
|||
|
||||
nums: []T = undefined, // 用于存储队列元素的数组
|
||||
cap: usize = 0, // 队列容量
|
||||
front: usize = 0, // 头指针,指向队首
|
||||
rear: usize = 0, // 尾指针,指向队尾 + 1
|
||||
front: usize = 0, // 队首指针,指向队首元素
|
||||
queSize: usize = 0, // 尾指针,指向队尾 + 1
|
||||
mem_arena: ?std.heap.ArenaAllocator = null,
|
||||
mem_allocator: std.mem.Allocator = undefined, // 内存分配器
|
||||
|
||||
|
@ -41,13 +41,12 @@ pub fn ArrayQueue(comptime T: type) type {
|
|||
|
||||
// 获取队列的长度
|
||||
pub fn size(self: *Self) usize {
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (self.capacity() + self.rear - self.front) % self.capacity();
|
||||
return self.queSize;
|
||||
}
|
||||
|
||||
// 判断队列是否为空
|
||||
pub fn isEmpty(self: *Self) bool {
|
||||
return self.rear == self.front;
|
||||
return self.queSize == 0;
|
||||
}
|
||||
|
||||
// 入队
|
||||
|
@ -56,17 +55,20 @@ pub fn ArrayQueue(comptime T: type) type {
|
|||
std.debug.print("队列已满\n", .{});
|
||||
return;
|
||||
}
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
var rear = (self.front + self.queSize) % self.capacity();
|
||||
// 尾结点后添加 num
|
||||
self.nums[self.rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
self.rear = (self.rear + 1) % self.capacity();
|
||||
self.nums[rear] = num;
|
||||
self.queSize++;
|
||||
}
|
||||
|
||||
// 出队
|
||||
pub fn poll(self: *Self) T {
|
||||
var num = self.peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
self.front = (self.front + 1) % self.capacity();
|
||||
self.queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
|
|
|
@ -742,45 +742,52 @@ comments: true
|
|||
/* 基于环形数组实现的队列 */
|
||||
class ArrayQueue {
|
||||
private int[] nums; // 用于存储队列元素的数组
|
||||
private int front = 0; // 头指针,指向队首
|
||||
private int rear = 0; // 尾指针,指向队尾 + 1
|
||||
private int front; // 队首指针,指向队首元素
|
||||
private int queSize; // 队列长度
|
||||
|
||||
public ArrayQueue(int capacity) {
|
||||
// 初始化数组
|
||||
nums = new int[capacity];
|
||||
front = queSize = 0;
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
public int capacity() {
|
||||
return nums.length;
|
||||
}
|
||||
|
||||
/* 获取队列的长度 */
|
||||
public int size() {
|
||||
int capacity = capacity();
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (capacity + rear - front) % capacity;
|
||||
return queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
public boolean isEmpty() {
|
||||
return rear - front == 0;
|
||||
return queSize == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
public void offer(int num) {
|
||||
if (size() == capacity()) {
|
||||
if (queSize == capacity()) {
|
||||
System.out.println("队列已满");
|
||||
return;
|
||||
}
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
int rear = (front + queSize) % capacity();
|
||||
// 尾结点后添加 num
|
||||
nums[rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
rear = (rear + 1) % capacity();
|
||||
queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
public int poll() {
|
||||
int num = peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity();
|
||||
queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
public int peek() {
|
||||
if (isEmpty())
|
||||
|
@ -797,49 +804,59 @@ comments: true
|
|||
class ArrayQueue {
|
||||
private:
|
||||
int *nums; // 用于存储队列元素的数组
|
||||
int cap; // 队列容量
|
||||
int front = 0; // 头指针,指向队首
|
||||
int rear = 0; // 尾指针,指向队尾 + 1
|
||||
int front; // 队首指针,指向队首元素
|
||||
int queSize; // 队列长度
|
||||
int queCapacity; // 队列容量
|
||||
|
||||
public:
|
||||
ArrayQueue(int capacity) {
|
||||
// 初始化数组
|
||||
cap = capacity;
|
||||
nums = new int[capacity];
|
||||
queCapacity = capacity;
|
||||
front = queSize = 0;
|
||||
}
|
||||
|
||||
~ArrayQueue() {
|
||||
delete[] nums;
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
int capacity() {
|
||||
return cap;
|
||||
return queCapacity;
|
||||
}
|
||||
|
||||
/* 获取队列的长度 */
|
||||
int size() {
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (capacity() + rear - front) % capacity();
|
||||
return queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
bool empty() {
|
||||
return rear - front == 0;
|
||||
return size() == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
void offer(int num) {
|
||||
if (size() == capacity()) {
|
||||
if (queSize == queCapacity) {
|
||||
cout << "队列已满" << endl;
|
||||
return;
|
||||
}
|
||||
// 计算队尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
int rear = (front + queSize) % queCapacity;
|
||||
// 尾结点后添加 num
|
||||
nums[rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
rear = (rear + 1) % capacity();
|
||||
queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
void poll() {
|
||||
int num = peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity();
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % queCapacity;
|
||||
queSize--;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
int peek() {
|
||||
if (empty())
|
||||
|
@ -856,8 +873,8 @@ comments: true
|
|||
class ArrayQueue:
|
||||
def __init__(self, size):
|
||||
self.__nums = [0] * size # 用于存储队列元素的数组
|
||||
self.__front = 0 # 头指针,指向队首
|
||||
self.__rear = 0 # 尾指针,指向队尾 + 1
|
||||
self.__front = 0 # 队首指针,指向队首元素
|
||||
self.__size = 0 # 队列长度
|
||||
|
||||
""" 获取队列的容量 """
|
||||
def capacity(self):
|
||||
|
@ -865,45 +882,34 @@ comments: true
|
|||
|
||||
""" 获取队列的长度 """
|
||||
def size(self):
|
||||
# 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (self.capacity() + self.__rear - self.__front) % self.capacity()
|
||||
return self.__size
|
||||
|
||||
""" 判断队列是否为空 """
|
||||
def is_empty(self):
|
||||
return (self.__rear - self.__front) == 0
|
||||
return self.__size == 0
|
||||
|
||||
""" 入队 """
|
||||
def push(self, val):
|
||||
if self.size() == self.capacity():
|
||||
print("队列已满")
|
||||
return False
|
||||
def push(self, num):
|
||||
assert self.__size < self.capacity(), "队列已满"
|
||||
# 计算尾指针,指向队尾索引 + 1
|
||||
# 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
rear = (self.__front + self.__size) % self.capacity()
|
||||
# 尾结点后添加 num
|
||||
self.__nums[self.__rear] = val
|
||||
# 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
self.__rear = (self.__rear + 1) % self.capacity()
|
||||
self.__nums[rear] = num
|
||||
self.__size += 1
|
||||
|
||||
""" 出队 """
|
||||
def poll(self):
|
||||
num = self.peek()
|
||||
# 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
# 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
self.__front = (self.__front + 1) % self.capacity()
|
||||
self.__size -= 1
|
||||
return num
|
||||
|
||||
""" 访问队首元素 """
|
||||
def peek(self):
|
||||
if self.is_empty():
|
||||
print("队列为空")
|
||||
return False
|
||||
assert not self.is_empty(), "队列为空"
|
||||
return self.__nums[self.__front]
|
||||
|
||||
""" 返回列表用于打印 """
|
||||
def to_list(self):
|
||||
res = [0] * self.size()
|
||||
j = self.__front
|
||||
for i in range(self.size()):
|
||||
res[i] = self.__nums[(j % self.capacity())]
|
||||
j += 1
|
||||
return res
|
||||
```
|
||||
|
||||
=== "Go"
|
||||
|
@ -911,54 +917,53 @@ comments: true
|
|||
```go title="array_queue.go"
|
||||
/* 基于环形数组实现的队列 */
|
||||
type arrayQueue struct {
|
||||
data []int // 用于存储队列元素的数组
|
||||
capacity int // 队列容量(即最多容量的元素个数)
|
||||
front int // 头指针,指向队首
|
||||
rear int // 尾指针,指向队尾 + 1
|
||||
nums []int // 用于存储队列元素的数组
|
||||
front int // 队首指针,指向队首元素
|
||||
queSize int // 队列长度
|
||||
queCapacity int // 队列容量(即最大容纳元素数量)
|
||||
}
|
||||
|
||||
// newArrayQueue 基于环形数组实现的队列
|
||||
func newArrayQueue(capacity int) *arrayQueue {
|
||||
func newArrayQueue(queCapacity int) *arrayQueue {
|
||||
return &arrayQueue{
|
||||
data: make([]int, capacity),
|
||||
capacity: capacity,
|
||||
nums: make([]int, queCapacity),
|
||||
queCapacity: queCapacity,
|
||||
front: 0,
|
||||
rear: 0,
|
||||
queSize: 0,
|
||||
}
|
||||
}
|
||||
|
||||
// size 获取队列的长度
|
||||
func (q *arrayQueue) size() int {
|
||||
size := (q.capacity + q.rear - q.front) % q.capacity
|
||||
return size
|
||||
return q.queSize
|
||||
}
|
||||
|
||||
// isEmpty 判断队列是否为空
|
||||
func (q *arrayQueue) isEmpty() bool {
|
||||
return q.rear-q.front == 0
|
||||
return q.queSize == 0
|
||||
}
|
||||
|
||||
// offer 入队
|
||||
func (q *arrayQueue) offer(v int) {
|
||||
// 当 rear == capacity 表示队列已满
|
||||
if q.size() == q.capacity {
|
||||
func (q *arrayQueue) offer(num int) {
|
||||
// 当 rear == queCapacity 表示队列已满
|
||||
if q.queSize == q.queCapacity {
|
||||
return
|
||||
}
|
||||
// 尾结点后添加
|
||||
q.data[q.rear] = v
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
q.rear = (q.rear + 1) % q.capacity
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
rear := (q.front + q.queSize) % q.queCapacity
|
||||
// 尾结点后添加 num
|
||||
q.nums[rear] = num
|
||||
q.queSize++
|
||||
}
|
||||
|
||||
// poll 出队
|
||||
func (q *arrayQueue) poll() any {
|
||||
if q.isEmpty() {
|
||||
return nil
|
||||
}
|
||||
v := q.data[q.front]
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
q.front = (q.front + 1) % q.capacity
|
||||
return v
|
||||
num := q.peek()
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
q.front = (q.front + 1) % q.queCapacity
|
||||
q.queSize--
|
||||
return num
|
||||
}
|
||||
|
||||
// peek 访问队首元素
|
||||
|
@ -966,8 +971,17 @@ comments: true
|
|||
if q.isEmpty() {
|
||||
return nil
|
||||
}
|
||||
v := q.data[q.front]
|
||||
return v
|
||||
return q.nums[q.front]
|
||||
}
|
||||
|
||||
// 获取 Slice 用于打印
|
||||
func (q *arrayQueue) toSlice() []int {
|
||||
rear := (q.front + q.queSize)
|
||||
if rear >= q.queCapacity {
|
||||
rear %= q.queCapacity
|
||||
return append(q.nums[q.front:], q.nums[:rear]...)
|
||||
}
|
||||
return q.nums[q.front:rear]
|
||||
}
|
||||
```
|
||||
|
||||
|
@ -976,46 +990,55 @@ comments: true
|
|||
```js title="array_queue.js"
|
||||
/* 基于环形数组实现的队列 */
|
||||
class ArrayQueue {
|
||||
#queue; // 用于存储队列元素的数组
|
||||
#front = 0; // 头指针,指向队首
|
||||
#rear = 0; // 尾指针,指向队尾 + 1
|
||||
#nums; // 用于存储队列元素的数组
|
||||
#front = 0; // 队首指针,指向队首元素
|
||||
#queSize = 0; // 队列长度
|
||||
|
||||
constructor(capacity) {
|
||||
this.#queue = new Array(capacity);
|
||||
this.#nums = new Array(capacity);
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
get capacity() {
|
||||
return this.#queue.length;
|
||||
return this.#nums.length;
|
||||
}
|
||||
|
||||
/* 获取队列的长度 */
|
||||
get size() {
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (this.capacity + this.#rear - this.#front) % this.capacity;
|
||||
return this.#queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
empty() {
|
||||
return this.#rear - this.#front == 0;
|
||||
return this.#queSize == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
offer(num) {
|
||||
if (this.size == this.capacity)
|
||||
throw new Error("队列已满");
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
const rear = (this.#front + this.size) % this.capacity;
|
||||
// 尾结点后添加 num
|
||||
this.#queue[this.#rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
this.#rear = (this.#rear + 1) % this.capacity;
|
||||
this.#nums[rear] = num;
|
||||
this.#queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
poll() {
|
||||
const num = this.peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
this.#front = (this.#front + 1) % this.capacity;
|
||||
this.#queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
peek() {
|
||||
if (this.empty())
|
||||
throw new Error("队列为空");
|
||||
return this.#queue[this.#front];
|
||||
return this.#nums[this.#front];
|
||||
}
|
||||
}
|
||||
```
|
||||
|
@ -1025,47 +1048,56 @@ comments: true
|
|||
```typescript title="array_queue.ts"
|
||||
/* 基于环形数组实现的队列 */
|
||||
class ArrayQueue {
|
||||
private queue: number[]; // 用于存储队列元素的数组
|
||||
private front: number = 0; // 头指针,指向队首
|
||||
private rear: number = 0; // 尾指针,指向队尾 + 1
|
||||
private CAPACITY: number = 1e5;
|
||||
constructor(capacity?: number) {
|
||||
this.queue = new Array<number>(capacity ?? this.CAPACITY);
|
||||
private nums: number[]; // 用于存储队列元素的数组
|
||||
private front: number; // 队首指针,指向队首元素
|
||||
private queSize: number; // 队列长度
|
||||
|
||||
constructor(capacity: number) {
|
||||
this.nums = new Array<number>(capacity);
|
||||
this.front = this.queSize = 0;
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
get capacity(): number {
|
||||
return this.queue.length;
|
||||
return this.nums.length;
|
||||
}
|
||||
|
||||
/* 获取队列的长度 */
|
||||
get size(): number {
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (this.capacity + this.rear - this.front) % this.capacity;
|
||||
return this.queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
empty(): boolean {
|
||||
return this.rear - this.front == 0;
|
||||
return this.queSize == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
offer(num: number): void {
|
||||
if (this.size == this.capacity)
|
||||
throw new Error("队列已满");
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
const rear = (this.front + this.queSize) % this.capacity;
|
||||
// 尾结点后添加 num
|
||||
this.queue[this.rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
this.rear = (this.rear + 1) % this.capacity;
|
||||
this.nums[rear] = num;
|
||||
this.queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
poll(): number {
|
||||
const num = this.peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
this.front = (this.front + 1) % this.capacity;
|
||||
this.queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
peek(): number {
|
||||
if (this.empty())
|
||||
throw new Error("队列为空");
|
||||
return this.queue[this.front];
|
||||
return this.nums[this.front];
|
||||
}
|
||||
}
|
||||
```
|
||||
|
@ -1083,51 +1115,59 @@ comments: true
|
|||
class ArrayQueue
|
||||
{
|
||||
private int[] nums; // 用于存储队列元素的数组
|
||||
private int front = 0; // 头指针,指向队首
|
||||
private int rear = 0; // 尾指针,指向队尾 + 1
|
||||
private int front; // 队首指针,指向队首元素
|
||||
private int queSize; // 队列长度
|
||||
|
||||
public ArrayQueue(int capacity)
|
||||
{
|
||||
// 初始化数组
|
||||
nums = new int[capacity];
|
||||
front = queSize = 0;
|
||||
}
|
||||
|
||||
/* 获取队列的容量 */
|
||||
public int capacity()
|
||||
{
|
||||
return nums.Length;
|
||||
}
|
||||
|
||||
/* 获取队列的长度 */
|
||||
public int size()
|
||||
{
|
||||
int capacity = this.capacity();
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (capacity + rear - front) % capacity;
|
||||
return queSize;
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
public bool isEmpty()
|
||||
{
|
||||
return rear - front == 0;
|
||||
return queSize == 0;
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
public void offer(int num)
|
||||
{
|
||||
if (size() == capacity())
|
||||
if (queSize == capacity())
|
||||
{
|
||||
Console.WriteLine("队列已满");
|
||||
return;
|
||||
}
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
int rear = (front + queSize) % capacity();
|
||||
// 尾结点后添加 num
|
||||
nums[rear] = num;
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
rear = (rear + 1) % capacity();
|
||||
queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
public int poll()
|
||||
{
|
||||
int num = peek();
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity();
|
||||
queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
public int peek()
|
||||
{
|
||||
|
@ -1144,8 +1184,8 @@ comments: true
|
|||
/* 基于环形数组实现的队列 */
|
||||
class ArrayQueue {
|
||||
private var nums: [Int] // 用于存储队列元素的数组
|
||||
private var front = 0 // 头指针,指向队首
|
||||
private var rear = 0 // 尾指针,指向队尾 + 1
|
||||
private var front = 0 // 队首指针,指向队首元素
|
||||
private var queSize = 0 // 队列长度
|
||||
|
||||
init(capacity: Int) {
|
||||
// 初始化数组
|
||||
|
@ -1159,14 +1199,12 @@ comments: true
|
|||
|
||||
/* 获取队列的长度 */
|
||||
func size() -> Int {
|
||||
let capacity = capacity()
|
||||
// 由于将数组看作为环形,可能 rear < front ,因此需要取余数
|
||||
return (capacity + rear - front) % capacity
|
||||
queSize
|
||||
}
|
||||
|
||||
/* 判断队列是否为空 */
|
||||
func isEmpty() -> Bool {
|
||||
rear - front == 0
|
||||
queSize == 0
|
||||
}
|
||||
|
||||
/* 入队 */
|
||||
|
@ -1175,19 +1213,22 @@ comments: true
|
|||
print("队列已满")
|
||||
return
|
||||
}
|
||||
// 计算尾指针,指向队尾索引 + 1
|
||||
// 通过取余操作,实现 rear 越过数组尾部后回到头部
|
||||
int rear = (front + queSize) % capacity();
|
||||
// 尾结点后添加 num
|
||||
nums[rear] = num
|
||||
// 尾指针向后移动一位,越过尾部后返回到数组头部
|
||||
rear = (rear + 1) % capacity()
|
||||
nums[rear] = num;
|
||||
queSize++;
|
||||
}
|
||||
|
||||
/* 出队 */
|
||||
@discardableResult
|
||||
func poll() -> Int {
|
||||
let num = peek()
|
||||
// 队头指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity()
|
||||
return num
|
||||
// 队首指针向后移动一位,若越过尾部则返回到数组头部
|
||||
front = (front + 1) % capacity();
|
||||
queSize--;
|
||||
return num;
|
||||
}
|
||||
|
||||
/* 访问队首元素 */
|
||||
|
|
Loading…
Reference in a new issue