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unify the coding style.
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krahets
2023-02-08 22:18:02 +08:00
parent 38751cc5f5
commit 6dc21691ed
63 changed files with 2703 additions and 3911 deletions
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208
codes/csharp/chapter_stack_and_queue/array_queue.cs
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@@ -6,127 +6,125 @@
using NUnit.Framework;
namespace hello_algo.chapter_stack_and_queue
namespace hello_algo.chapter_stack_and_queue;
/* 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; // 队首指针，指向队首元素
private int queSize; // 队列长度
/* 基于环形数组实现的队列 */
class ArrayQueue
public ArrayQueue(int capacity)
{
private int[] nums; // 用于存储队列元素的数组
private int front; // 队首指针，指向队首元素
private int queSize; // 队列长度
nums = new int[capacity];
front = queSize = 0;
}
public ArrayQueue(int capacity)
{
nums = new int[capacity];
front = queSize = 0;
}
/* 获取队列的容量 */
public int capacity()
{
return nums.Length;
}
/* 获取队列的容量 */
public int capacity()
{
return nums.Length;
}
/* 获取队列的长度 */
public int size()
{
return queSize;
}
/* 获取队列的长度 */
public int size()
{
return queSize;
}
/* 判断队列是否为空 */
public bool isEmpty()
{
return queSize == 0;
}
/* 判断队列是否为空 */
public bool isEmpty()
/* 入队 */
public void push(int num)
{
if (queSize == capacity())
{
return queSize == 0;
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;
queSize++;
}
/* 入队 */
public void push(int num)
{
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;
queSize++;
}
/* 出队 */
public int poll()
{
int num = peek();
// 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;
}
/* 出队 */
public int poll()
/* 访问队首元素 */
public int peek()
{
if (isEmpty())
throw new Exception();
return nums[front];
}
/* 返回数组 */
public int[] toArray()
{
// 仅转换有效长度范围内的列表元素
int[] res = new int[queSize];
for (int i = 0, j = front; i < queSize; i++, j++)
{
int num = peek();
// 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;
res[i] = nums[j % this.capacity()];
}
return res;
}
}
public class array_queue
{
[Test]
public void Test()
{
/* 初始化队列 */
int capacity = 10;
ArrayQueue queue = new ArrayQueue(capacity);
/* 元素入队 */
queue.push(1);
queue.push(3);
queue.push(2);
queue.push(5);
queue.push(4);
Console.WriteLine("队列 queue = " + string.Join(",", queue.toArray()));
/* 访问队首元素 */
public int peek()
{
if (isEmpty())
throw new Exception();
return nums[front];
}
int peek = queue.peek();
Console.WriteLine("队首元素 peek = " + peek);
/* 返回数组 */
public int[] toArray()
/* 元素出队 */
int poll = queue.poll();
Console.WriteLine("出队元素 poll = " + poll + "，出队后 queue = " + string.Join(",", queue.toArray()));
/* 获取队列的长度 */
int size = queue.size();
Console.WriteLine("队列长度 size = " + size);
/* 判断队列是否为空 */
bool isEmpty = queue.isEmpty();
Console.WriteLine("队列是否为空 = " + isEmpty);
/* 测试环形数组 */
for (int i = 0; i < 10; i++)
{
// 仅转换有效长度范围内的列表元素
int[] res = new int[queSize];
for (int i = 0, j = front; i < queSize; i++, j++)
{
res[i] = nums[j % this.capacity()];
}
return res;
queue.push(i);
queue.poll();
Console.WriteLine("第 " + i + " 轮入队 + 出队后 queue = " + string.Join(",", queue.toArray()));
}
}
public class array_queue
{
[Test]
public void Test()
{
/* 初始化队列 */
int capacity = 10;
ArrayQueue queue = new ArrayQueue(capacity);
/* 元素入队 */
queue.push(1);
queue.push(3);
queue.push(2);
queue.push(5);
queue.push(4);
Console.WriteLine("队列 queue = " + string.Join(",", queue.toArray()));
/* 访问队首元素 */
int peek = queue.peek();
Console.WriteLine("队首元素 peek = " + peek);
/* 元素出队 */
int poll = queue.poll();
Console.WriteLine("出队元素 poll = " + poll + "，出队后 queue = " + string.Join(",", queue.toArray()));
/* 获取队列的长度 */
int size = queue.size();
Console.WriteLine("队列长度 size = " + size);
/* 判断队列是否为空 */
bool isEmpty = queue.isEmpty();
Console.WriteLine("队列是否为空 = " + isEmpty);
/* 测试环形数组 */
for (int i = 0; i < 10; i++)
{
queue.push(i);
queue.poll();
Console.WriteLine("第 " + i + " 轮入队 + 出队后 queue = " + string.Join(",", queue.toArray()));
}
}
}
}
}

154
codes/csharp/chapter_stack_and_queue/array_stack.cs
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@@ -6,93 +6,91 @@
using NUnit.Framework;
namespace hello_algo.chapter_stack_and_queue
namespace hello_algo.chapter_stack_and_queue;
/* 基于数组实现的栈 */
class ArrayStack
{
/* 基于数组实现的栈 */
class ArrayStack
private List<int> stack;
public ArrayStack()
{
private List<int> stack;
public ArrayStack()
{
// 初始化列表（动态数组）
stack = new();
}
/* 获取栈的长度 */
public int size()
{
return stack.Count();
}
/* 判断栈是否为空 */
public bool isEmpty()
{
return size() == 0;
}
/* 入栈 */
public void push(int num)
{
stack.Add(num);
}
/* 出栈 */
public int pop()
{
if (isEmpty())
throw new Exception();
var val = peek();
stack.RemoveAt(size() - 1);
return val;
}
/* 访问栈顶元素 */
public int peek()
{
if (isEmpty())
throw new Exception();
return stack[size() - 1];
}
/* 将 List 转化为 Array 并返回 */
public int[] toArray()
{
return stack.ToArray();
}
// 初始化列表（动态数组）
stack = new();
}
public class array_stack
/* 获取栈的长度 */
public int size()
{
[Test]
public void Test()
{
/* 初始化栈 */
ArrayStack stack = new ArrayStack();
return stack.Count();
}
/* 元素入栈 */
stack.push(1);
stack.push(3);
stack.push(2);
stack.push(5);
stack.push(4);
Console.WriteLine("栈 stack = " + String.Join(",", stack.toArray()));
/* 判断栈是否为空 */
public bool isEmpty()
{
return size() == 0;
}
/* 访问栈顶元素 */
int peek = stack.peek();
Console.WriteLine("栈顶元素 peek = " + peek);
/* 入栈 */
public void push(int num)
{
stack.Add(num);
}
/* 元素出栈 */
int pop = stack.pop();
Console.WriteLine("出栈元素 pop = " + pop + "，出栈后 stack = " + String.Join(",", stack.toArray()));
/* 出栈 */
public int pop()
{
if (isEmpty())
throw new Exception();
var val = peek();
stack.RemoveAt(size() - 1);
return val;
}
/* 获取栈的长度 */
int size = stack.size();
Console.WriteLine("栈的长度 size = " + size);
/* 访问栈顶元素 */
public int peek()
{
if (isEmpty())
throw new Exception();
return stack[size() - 1];
}
/* 判断是否为空 */
bool isEmpty = stack.isEmpty();
Console.WriteLine("栈是否为空 = " + isEmpty);
}
/* 将 List 转化为 Array 并返回 */
public int[] toArray()
{
return stack.ToArray();
}
}
public class array_stack
{
[Test]
public void Test()
{
/* 初始化栈 */
ArrayStack stack = new ArrayStack();
/* 元素入栈 */
stack.push(1);
stack.push(3);
stack.push(2);
stack.push(5);
stack.push(4);
Console.WriteLine("栈 stack = " + String.Join(",", stack.toArray()));
/* 访问栈顶元素 */
int peek = stack.peek();
Console.WriteLine("栈顶元素 peek = " + peek);
/* 元素出栈 */
int pop = stack.pop();
Console.WriteLine("出栈元素 pop = " + pop + "，出栈后 stack = " + String.Join(",", stack.toArray()));
/* 获取栈的长度 */
int size = stack.size();
Console.WriteLine("栈的长度 size = " + size);
/* 判断是否为空 */
bool isEmpty = stack.isEmpty();
Console.WriteLine("栈是否为空 = " + isEmpty);
}
}

63
codes/csharp/chapter_stack_and_queue/deque.cs
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@@ -6,44 +6,43 @@
using NUnit.Framework;
namespace hello_algo.chapter_stack_and_queue
namespace hello_algo.chapter_stack_and_queue;
public class deque
{
public class deque
[Test]
public void Test()
{
[Test]
public void Test()
{
/* 初始化双向队列 */
// 在 C# 中，将链表 LinkedList 看作双向队列来使用
LinkedList<int> deque = new LinkedList<int>();
/* 初始化双向队列 */
// 在 C# 中，将链表 LinkedList 看作双向队列来使用
LinkedList<int> deque = new LinkedList<int>();
/* 元素入队 */
deque.AddLast(2); // 添加至队尾
deque.AddLast(5);
deque.AddLast(4);
deque.AddFirst(3); // 添加至队首
deque.AddFirst(1);
Console.WriteLine("双向队列 deque = " + String.Join(",", deque.ToArray()));
/* 元素入队 */
deque.AddLast(2); // 添加至队尾
deque.AddLast(5);
deque.AddLast(4);
deque.AddFirst(3); // 添加至队首
deque.AddFirst(1);
Console.WriteLine("双向队列 deque = " + String.Join(",", deque.ToArray()));
/* 访问元素 */
int peekFirst = deque.First.Value; // 队首元素
Console.WriteLine("队首元素 peekFirst = " + peekFirst);
int peekLast = deque.Last.Value; // 队尾元素
Console.WriteLine("队尾元素 peekLast = " + peekLast);
/* 访问元素 */
int peekFirst = deque.First.Value; // 队首元素
Console.WriteLine("队首元素 peekFirst = " + peekFirst);
int peekLast = deque.Last.Value; // 队尾元素
Console.WriteLine("队尾元素 peekLast = " + peekLast);
/* 元素出队 */
deque.RemoveFirst(); // 队首元素出队
Console.WriteLine("队首元素出队后 deque = " + String.Join(",", deque.ToArray()));
deque.RemoveLast(); // 队尾元素出队
Console.WriteLine("队尾元素出队后 deque = " + String.Join(",", deque.ToArray()));
/* 元素出队 */
deque.RemoveFirst(); // 队首元素出队
Console.WriteLine("队首元素出队后 deque = " + String.Join(",", deque.ToArray()));
deque.RemoveLast(); // 队尾元素出队
Console.WriteLine("队尾元素出队后 deque = " + String.Join(",", deque.ToArray()));
/* 获取双向队列的长度 */
int size = deque.Count;
Console.WriteLine("双向队列长度 size = " + size);
/* 获取双向队列的长度 */
int size = deque.Count;
Console.WriteLine("双向队列长度 size = " + size);
/* 判断双向队列是否为空 */
bool isEmpty = deque.Count == 0;
Console.WriteLine("双向队列是否为空 = " + isEmpty);
}
/* 判断双向队列是否为空 */
bool isEmpty = deque.Count == 0;
Console.WriteLine("双向队列是否为空 = " + isEmpty);
}
}

197
codes/csharp/chapter_stack_and_queue/linkedlist_queue.cs
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@@ -7,118 +7,117 @@
using hello_algo.include;
using NUnit.Framework;
namespace hello_algo.chapter_stack_and_queue
namespace hello_algo.chapter_stack_and_queue;
/* 基于链表实现的队列 */
class LinkedListQueue
{
/* 基于链表实现的队列 */
class LinkedListQueue
private ListNode? front, rear; // 头结点 front ，尾结点 rear
private int queSize = 0;
public LinkedListQueue()
{
private ListNode? front, rear; // 头结点 front ，尾结点 rear
private int queSize = 0;
front = null;
rear = null;
}
public LinkedListQueue()
{
front = null;
rear = null;
}
/* 获取队列的长度 */
public int size()
{
return queSize;
}
/* 获取队列的长度 */
public int size()
{
return queSize;
}
/* 判断队列是否为空 */
public bool isEmpty()
{
return size() == 0;
}
/* 判断队列是否为空 */
public bool isEmpty()
/* 入队 */
public void push(int num)
{
// 尾结点后添加 num
ListNode node = new ListNode(num);
// 如果队列为空，则令头、尾结点都指向该结点
if (front == null)
{
return size() == 0;
front = node;
rear = node;
// 如果队列不为空，则将该结点添加到尾结点后
}
else if (rear != null)
{
rear.next = node;
rear = node;
}
queSize++;
}
/* 入队 */
public void push(int num)
{
// 尾结点后添加 num
ListNode node = new ListNode(num);
// 如果队列为空，则令头、尾结点都指向该结点
if (front == null)
{
front = node;
rear = node;
// 如果队列不为空，则将该结点添加到尾结点后
}
else if (rear != null)
{
rear.next = node;
rear = node;
}
queSize++;
}
/* 出队 */
public int poll()
{
int num = peek();
// 删除头结点
front = front?.next;
queSize--;
return num;
}
/* 出队 */
public int poll()
/* 访问队首元素 */
public int peek()
{
if (size() == 0 || front == null)
throw new Exception();
return front.val;
}
/* 将链表转化为 Array 并返回 */
public int[] toArray()
{
if (front == null)
return Array.Empty<int>();
ListNode node = front;
int[] res = new int[size()];
for (int i = 0; i < res.Length; i++)
{
int num = peek();
// 删除头结点
front = front?.next;
queSize--;
return num;
res[i] = node.val;
node = node.next;
}
return res;
}
}
public class linkedlist_queue
{
[Test]
public void Test()
{
/* 初始化队列 */
LinkedListQueue queue = new LinkedListQueue();
/* 元素入队 */
queue.push(1);
queue.push(3);
queue.push(2);
queue.push(5);
queue.push(4);
Console.WriteLine("队列 queue = " + String.Join(",", queue.toArray()));
/* 访问队首元素 */
public int peek()
{
if (size() == 0 || front == null)
throw new Exception();
return front.val;
}
int peek = queue.peek();
Console.WriteLine("队首元素 peek = " + peek);
/* 将链表转化为 Array 并返回 */
public int[] toArray()
{
if (front == null)
return Array.Empty<int>();
/* 元素出队 */
int poll = queue.poll();
Console.WriteLine("出队元素 poll = " + poll + "，出队后 queue = " + String.Join(",", queue.toArray()));
ListNode node = front;
int[] res = new int[size()];
for (int i = 0; i < res.Length; i++)
{
res[i] = node.val;
node = node.next;
}
return res;
}
/* 获取队列的长度 */
int size = queue.size();
Console.WriteLine("队列长度 size = " + size);
/* 判断队列是否为空 */
bool isEmpty = queue.isEmpty();
Console.WriteLine("队列是否为空 = " + isEmpty);
}
public class linkedlist_queue
{
[Test]
public void Test()
{
/* 初始化队列 */
LinkedListQueue queue = new LinkedListQueue();
/* 元素入队 */
queue.push(1);
queue.push(3);
queue.push(2);
queue.push(5);
queue.push(4);
Console.WriteLine("队列 queue = " + String.Join(",", queue.toArray()));
/* 访问队首元素 */
int peek = queue.peek();
Console.WriteLine("队首元素 peek = " + peek);
/* 元素出队 */
int poll = queue.poll();
Console.WriteLine("出队元素 poll = " + poll + "，出队后 queue = " + String.Join(",", queue.toArray()));
/* 获取队列的长度 */
int size = queue.size();
Console.WriteLine("队列长度 size = " + size);
/* 判断队列是否为空 */
bool isEmpty = queue.isEmpty();
Console.WriteLine("队列是否为空 = " + isEmpty);
}
}
}
}

184
codes/csharp/chapter_stack_and_queue/linkedlist_stack.cs
View File

@@ -7,107 +7,107 @@
using hello_algo.include;
using NUnit.Framework;
namespace hello_algo.chapter_stack_and_queue
namespace hello_algo.chapter_stack_and_queue;
/* 基于链表实现的栈 */
class LinkedListStack
{
class LinkedListStack
private ListNode? stackPeek; // 将头结点作为栈顶
private int stkSize = 0; // 栈的长度
public LinkedListStack()
{
private ListNode? stackPeek; // 将头结点作为栈顶
private int stkSize = 0; // 栈的长度
stackPeek = null;
}
public LinkedListStack()
/* 获取栈的长度 */
public int size()
{
return stkSize;
}
/* 判断栈是否为空 */
public bool isEmpty()
{
return size() == 0;
}
/* 入栈 */
public void push(int num)
{
ListNode node = new ListNode(num);
node.next = stackPeek;
stackPeek = node;
stkSize++;
}
/* 出栈 */
public int pop()
{
if (stackPeek == null)
throw new Exception();
int num = peek();
stackPeek = stackPeek.next;
stkSize--;
return num;
}
/* 访问栈顶元素 */
public int peek()
{
if (size() == 0 || stackPeek == null)
throw new Exception();
return stackPeek.val;
}
/* 将 List 转化为 Array 并返回 */
public int[] toArray()
{
if (stackPeek == null)
return Array.Empty<int>();
ListNode node = stackPeek;
int[] res = new int[size()];
for (int i = res.Length - 1; i >= 0; i--)
{
stackPeek = null;
res[i] = node.val;
node = node.next;
}
return res;
}
}
/* 获取栈的长度 */
public int size()
{
return stkSize;
}
public class linkedlist_stack
{
[Test]
public void Test()
{
/* 初始化栈 */
LinkedListStack stack = new LinkedListStack();
/* 判断栈是否为空 */
public bool isEmpty()
{
return size() == 0;
}
/* 入栈 */
public void push(int num)
{
ListNode node = new ListNode(num);
node.next = stackPeek;
stackPeek = node;
stkSize++;
}
/* 出栈 */
public int pop()
{
if (stackPeek == null)
throw new Exception();
int num = peek();
stackPeek = stackPeek.next;
stkSize--;
return num;
}
/* 元素入栈 */
stack.push(1);
stack.push(3);
stack.push(2);
stack.push(5);
stack.push(4);
Console.WriteLine("栈 stack = " + String.Join(",", stack.toArray()));
/* 访问栈顶元素 */
public int peek()
{
if (size() == 0 || stackPeek==null)
throw new Exception();
return stackPeek.val;
}
int peek = stack.peek();
Console.WriteLine("栈顶元素 peek = " + peek);
/* 将 List 转化为 Array 并返回 */
public int[] toArray()
{
if (stackPeek == null)
return Array.Empty<int>();
/* 元素出栈 */
int pop = stack.pop();
Console.WriteLine("出栈元素 pop = " + pop + "，出栈后 stack = " + String.Join(",", stack.toArray()));
ListNode node = stackPeek;
int[] res = new int[size()];
for (int i = res.Length - 1; i >= 0; i--)
{
res[i] = node.val;
node = node.next;
}
return res;
}
/* 获取栈的长度 */
int size = stack.size();
Console.WriteLine("栈的长度 size = " + size);
/* 判断是否为空 */
bool isEmpty = stack.isEmpty();
Console.WriteLine("栈是否为空 = " + isEmpty);
}
public class linkedlist_stack
{
[Test]
public void Test()
{
/* 初始化栈 */
LinkedListStack stack = new LinkedListStack();
/* 元素入栈 */
stack.push(1);
stack.push(3);
stack.push(2);
stack.push(5);
stack.push(4);
Console.WriteLine("栈 stack = " + String.Join(",",stack.toArray()));
/* 访问栈顶元素 */
int peek = stack.peek();
Console.WriteLine("栈顶元素 peek = " + peek);
/* 元素出栈 */
int pop = stack.pop();
Console.WriteLine("出栈元素 pop = " + pop + "，出栈后 stack = " + String.Join(",",stack.toArray()));
/* 获取栈的长度 */
int size = stack.size();
Console.WriteLine("栈的长度 size = " + size);
/* 判断是否为空 */
bool isEmpty = stack.isEmpty();
Console.WriteLine("栈是否为空 = " + isEmpty);
}
}
}
}

54
codes/csharp/chapter_stack_and_queue/queue.cs
View File

@@ -6,40 +6,38 @@
using NUnit.Framework;
namespace hello_algo.chapter_stack_and_queue
namespace hello_algo.chapter_stack_and_queue;
public class queue
{
public class queue
[Test]
public void Test()
{
[Test]
public void Test()
{
/* 初始化队列 */
Queue<int> queue = new();
/* 初始化队列 */
Queue<int> queue = new();
/* 元素入队 */
queue.Enqueue(1);
queue.Enqueue(3);
queue.Enqueue(2);
queue.Enqueue(5);
queue.Enqueue(4);
Console.WriteLine("队列 queue = " + String.Join(",", queue.ToArray()));
/* 元素入队 */
queue.Enqueue(1);
queue.Enqueue(3);
queue.Enqueue(2);
queue.Enqueue(5);
queue.Enqueue(4);
Console.WriteLine("队列 queue = " + String.Join(",", queue.ToArray()));
/* 访问队首元素 */
int peek = queue.Peek();
Console.WriteLine("队首元素 peek = " + peek);
/* 访问队首元素 */
int peek = queue.Peek();
Console.WriteLine("队首元素 peek = " + peek);
/* 元素出队 */
int poll = queue.Dequeue();
Console.WriteLine("出队元素 poll = " + poll + "，出队后 queue = " + String.Join(",", queue.ToArray()));
/* 元素出队 */
int poll = queue.Dequeue();
Console.WriteLine("出队元素 poll = " + poll + "，出队后 queue = " + String.Join(",", queue.ToArray()));
/* 获取队列的长度 */
int size = queue.Count();
Console.WriteLine("队列长度 size = " + size);
/* 获取队列的长度 */
int size = queue.Count();
Console.WriteLine("队列长度 size = " + size);
/* 判断队列是否为空 */
bool isEmpty = queue.Count() == 0;
Console.WriteLine("队列是否为空 = " + isEmpty);
}
/* 判断队列是否为空 */
bool isEmpty = queue.Count() == 0;
Console.WriteLine("队列是否为空 = " + isEmpty);
}
}

57
codes/csharp/chapter_stack_and_queue/stack.cs
View File

@@ -6,40 +6,39 @@
using NUnit.Framework;
namespace hello_algo.chapter_stack_and_queue
namespace hello_algo.chapter_stack_and_queue;
public class stack
{
public class stack
[Test]
public void Test()
{
[Test]
public void Test()
{
/* 初始化栈 */
Stack<int> stack = new();
/* 初始化栈 */
Stack<int> stack = new();
/* 元素入栈 */
stack.Push(1);
stack.Push(3);
stack.Push(2);
stack.Push(5);
stack.Push(4);
// 请注意，stack.ToArray() 得到的是倒序序列，即索引 0 为栈顶
Console.WriteLine("栈 stack = " + string.Join(",", stack.ToArray()));
/* 元素入栈 */
stack.Push(1);
stack.Push(3);
stack.Push(2);
stack.Push(5);
stack.Push(4);
// 请注意，stack.ToArray() 得到的是倒序序列，即索引 0 为栈顶
Console.WriteLine("栈 stack = " + string.Join(",", stack.ToArray()));
/* 访问栈顶元素 */
int peek = stack.Peek();
Console.WriteLine("栈顶元素 peek = " + peek);
/* 访问栈顶元素 */
int peek = stack.Peek();
Console.WriteLine("栈顶元素 peek = " + peek);
/* 元素出栈 */
int pop = stack.Pop();
Console.WriteLine("出栈元素 pop = " + pop + "，出栈后 stack = " + string.Join(",", stack.ToArray()));
/* 元素出栈 */
int pop = stack.Pop();
Console.WriteLine("出栈元素 pop = " + pop + "，出栈后 stack = " + string.Join(",", stack.ToArray()));
/* 获取栈的长度 */
int size = stack.Count();
Console.WriteLine("栈的长度 size = " + size);
/* 获取栈的长度 */
int size = stack.Count();
Console.WriteLine("栈的长度 size = " + size);
/* 判断是否为空 */
bool isEmpty = stack.Count() == 0;
Console.WriteLine("栈是否为空 = " + isEmpty);
}
/* 判断是否为空 */
bool isEmpty = stack.Count() == 0;
Console.WriteLine("栈是否为空 = " + isEmpty);
}
}
}