C++实现循环队列_循环队列的c++程序

一、队列的定义

class CirQueue
{
public:
 
	CirQueue(int len)
	{
		this->m_Array = new int[len] {};
		this->m_Front_idx = 0;
		this->m_Rear_idx = 0;
		this->m_Len = len;
	}
 
	void Push(int data);
	void Delete();
	void Print();
 
	~CirQueue()
	{
		if (this->m_Array != nullptr)
		{
			delete[] this->m_Array;
			this->m_Array = nullptr;
		}
	}
 
private:
 
	int* m_Array;
	int m_Front_idx;
	int m_Rear_idx;
	int m_Len;
};

二、插入

void CirQueue::Push(int data)
{
	if ((this->m_Rear_idx + 1) % this->m_Len == this->m_Front_idx)
	{
		cout << "队列已满，插入失败" << endl;
		return;
	}
	this->m_Array[this->m_Rear_idx] = data;
	this->m_Rear_idx = (this->m_Rear_idx + 1) % this->m_Len;
}

三、删除

void CirQueue::Delete()
{
	if (this->m_Front_idx == this->m_Rear_idx)
	{
		cout << "队列为空，删除失败" << endl;
		return;
	}
	this->m_Array[this->m_Front_idx] = 0;
	this->m_Front_idx = (this->m_Front_idx + 1) % this->m_Len;
}

四、整体展示

#include <iostream>
 
using namespace std;
 
class CirQueue
{
public:
 
	CirQueue(int len)
	{
		this->m_Array = new int[len] {};
		this->m_Front_idx = 0;
		this->m_Rear_idx = 0;
		this->m_Len = len;
	}
 
	void Push(int data);
	void Delete();
	void Print();
 
	~CirQueue()
	{
		if (this->m_Array != nullptr)
		{
			delete[] this->m_Array;
			this->m_Array = nullptr;
		}
	}
 
private:
 
	int* m_Array;
	int m_Front_idx;
	int m_Rear_idx;
	int m_Len;
};
 
void CirQueue::Push(int data)
{
	if ((this->m_Rear_idx + 1) % this->m_Len == this->m_Front_idx)
	{
		cout << "队列已满，插入失败" << endl;
		return;
	}
	this->m_Array[this->m_Rear_idx] = data;
	this->m_Rear_idx = (this->m_Rear_idx + 1) % this->m_Len;
}
 
void CirQueue::Delete()
{
	if (this->m_Front_idx == this->m_Rear_idx)
	{
		cout << "队列为空，删除失败" << endl;
		return;
	}
	this->m_Array[this->m_Front_idx] = 0;
	this->m_Front_idx = (this->m_Front_idx + 1) % this->m_Len;
}
 
void CirQueue::Print()
{
	for (int i = 0; i < this->m_Len - 1; ++i)
	{
		cout << this->m_Array[i] << " ";
	}
	cout << endl;
}
 
void Text()
{
	CirQueue CQ(5);
	CQ.Push(5);
	CQ.Push(2);
	CQ.Push(3);
	CQ.Push(4);
	CQ.Print();
	CQ.Delete();
	CQ.Print();
}
 
int main()
{
	Text();
 
	system("pause");
	return 0;
}