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一、创建sqqueue.h头文件,定义队列并声明函数
- #pragma once
- #include<iostream>
- using namespace std;
- #define MAXSIZE 100 //最大队列长度
-
- //队列
- struct SqQueue
- {
- int* base; //初始化的动态分配存储空间
- int front; //头指针
- int rear; //尾指针
- };
-
- //初始化
- bool InitQueue(SqQueue& Q);
-
- //插入(入队)
- bool InsertQueue(SqQueue& Q, int e);
-
- //删除(出队)
- bool DeQueue(SqQueue& Q, int& e);
-
- //遍历
- void PrintQueue(SqQueue Q);
-
- //判断是否为空
- bool QueueEmpty(SqQueue Q);
-
- //队列长度
- int QueueLength(SqQueue Q);
-
- //清空
- bool ClearQueue(SqQueue& Q);
-
- //销毁
- bool DestroyQueue(SqQueue& Q);
二、创建sqqueue.cpp源文件,将声明的函数做具体实现
- #include"sqqueue.h"
-
- //初始化
- bool InitQueue(SqQueue& Q)
- {
- Q.base = new int[MAXSIZE]; //分配数组空间
- if (!Q.base)
- {
- exit(0);
- }
- Q.front = Q.rear = 0; //头指针尾指针置为0,队列为空
- return true;
- }
-
- //插入(入队)
- bool InsertQueue(SqQueue& Q, int e)
- {
- if ((Q.rear + 1) % MAXSIZE == Q.front) //队满
- {
- return false;
- }
- Q.base[Q.rear] = e; //新元素插入队尾
- Q.rear = (Q.rear + 1) % MAXSIZE; //队尾指针加1
- return true;
- }
-
- //删除(出队)
- bool DeQueue(SqQueue& Q, int& e)
- {
- if (Q.front == Q.rear) //队空
- {
- return false;
- }
-
- e = Q.base[Q.front]; //保存队头元素
- Q.front = (Q.front + 1) % MAXSIZE; //队头指针加1
- return true;
- }
-
- //遍历
- void PrintQueue(SqQueue Q)
- {
- while (Q.front != Q.rear)
- {
- cout << Q.base[Q.front] << endl; //输出头指针元素
- Q.front = (Q.front + 1) % MAXSIZE; //头指针加1
- }
- }
-
- //判断是否为空
- bool QueueEmpty(SqQueue Q)
- {
- if (Q.front == Q.rear)
- {
- return true;
- }
- else
- {
- return false;
- }
- }
-
- //队列长度
- int QueueLength(SqQueue Q)
- {
- return (Q.rear - Q.front + MAXSIZE) % MAXSIZE;
- }
-
- //清空
- bool ClearQueue(SqQueue& Q)
- {
- if (Q.base)
- {
- Q.front = Q.rear;
- }
- return true;
- }
-
- //销毁
- bool DestroyQueue(SqQueue& Q)
- {
- if (Q.base)
- {
- delete Q.base;
- Q.front = Q.rear = 0;
- }
- return true;
- }
三、在主函数中测试
- #include<iostream>
- using namespace std;
- #include"sqqueue.h"
-
- int main()
- {
- //1.创建队列Q,并初始化
- SqQueue Q;
- InitQueue(Q);
-
- //2.插入数据
- int arr[5] = { 1,2,3,4,5 };
- for (int i = 0; i < 5; i++)
- {
- InsertQueue(Q, arr[i]);
- }
- cout << "插入后元素:" << endl;
- //3.遍历
- PrintQueue(Q);
-
- //4.删除
- int e;
- DeQueue(Q, e);
- cout << "元素" << e << "以删除" << endl;
- cout << "删除后元素:" << endl;
- PrintQueue(Q);
-
- //5.判断是否为空
- if (QueueEmpty(Q))
- {
- cout << "队列为空" << endl;
- }
- else
- {
- //6.队列长度
- cout << "队列不为空队列长度为:" << QueueLength(Q) << endl;
- }
-
- //7.清空
- ClearQueue(Q);
- cout << "清空后遍历:" << endl;
- PrintQueue(Q);
-
- //8.销毁
- DestroyQueue(Q);
- cout << "销毁后遍历:" << endl;
- PrintQueue(Q);
-
- system("pause");
- return 0;
- }
四、最终结果
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