目录
顺序队列是由一维数组实现的队列,其中队头元素的下标为0,队尾元素的下标为n-1(n为数组大小),队列的大小在创建时确定,且在队列的生命周期内保持不变。
顺序队列的优点:
顺序队列的缺点:
循环队列是一种线性数据结构,它将队列的元素存储在一个连续的数组中,并通过使用循环指针来管理队列的插入和删除操作。循环队列的特点在于,当队列为空时,头尾指针指向同一位置;当队列满时,头尾指针也指向同一位置。?
循环队列的优点:
循环队列的缺点:
#define OK 1
#define ERROR 0
#define OVERFLOW -1
#define MAXSIZE 100
typedef int QElemType;
typedef int Status;
//创建结构体
typedef struct {
QElemType *base;
int front;
int rear;
} SqQueue;
//初始化
Status InitQueue(SqQueue &Q) {
//构造一个空队列
Q.base = new QElemType[MAXSIZE];
if (!Q.base) {
exit(OVERFLOW);
}
Q.front = Q.rear = 0;
return OK;
}
//销毁队列
Status DestroyQueue(SqQueue &Q) {
if (Q.base) {
delete Q.base;
}
Q.base = NULL;
Q.front = Q.rear = 0;
return OK;
}
//清空队列
Status ClearQueue(SqQueue &Q) {
Q.front = Q.rear = 0;
return OK;
}
//求长度
Status QueueLength(SqQueue Q) {
return (Q.rear - Q.front + MAXSIZE) % MAXSIZE;
}
Status QueueEmpty(SqQueue Q) {
if (Q.front == Q.rear) {
return true;
} else {
return false;
}
}
//求队头元素
Status GetHead(SqQueue Q, QElemType &e) {
if (Q.front == Q.rear) {
return ERROR;
}
e = Q.base[Q.front];
return OK;
}
//循环队列入队
Status EnQueue(SqQueue &Q, QElemType e) {
if ((Q.rear + 1) % MAXSIZE == Q.front) return ERROR;
Q.base[Q.rear] = e;
Q.rear = (Q.rear + 1) % MAXSIZE;
return OK;
}
//循环队列出队
Status DeQueue(SqQueue &Q, QElemType &e) {
if (Q.front == Q.rear) {
return ERROR;
}
e = Q.base[Q.front];
Q.front = (Q.front + 1) % MAXSIZE;
return OK;
}
//遍历队列
void DisplayQueue(SqQueue Q) {
int i = Q.front;
printf("队列元素为: ");
while (Q.front != Q.rear && (i + MAXSIZE) % MAXSIZE != Q.rear) {
printf("%d ", Q.base[i]);
i++;
}
}
#include <stdio.h>
#include <stdlib.h>
#define OK 1
#define ERROR 0
#define OVERFLOW -1
#define MAXSIZE 100
typedef int QElemType;
typedef int Status;
//创建结构体
typedef struct {
QElemType *base;
int front;
int rear;
} SqQueue;
//初始化
Status InitQueue(SqQueue &Q) {
//构造一个空队列
Q.base = new QElemType[MAXSIZE];
if (!Q.base) {
exit(OVERFLOW);
}
Q.front = Q.rear = 0;
return OK;
}
//销毁队列
Status DestroyQueue(SqQueue &Q) {
if (Q.base) {
delete Q.base;
}
Q.base = NULL;
Q.front = Q.rear = 0;
return OK;
}
//清空队列
Status ClearQueue(SqQueue &Q) {
Q.front = Q.rear = 0;
return OK;
}
//求长度
Status QueueLength(SqQueue Q) {
return (Q.rear - Q.front + MAXSIZE) % MAXSIZE;
}
//判空
Status QueueEmpty(SqQueue Q) {
if (Q.front == Q.rear) {
return true;
} else {
return false;
}
}
//求队头元素
Status GetHead(SqQueue Q, QElemType &e) {
if (Q.front == Q.rear) {
return ERROR;
}
e = Q.base[Q.front];
return OK;
}
//循环队列入队
Status EnQueue(SqQueue &Q, QElemType e) {
if ((Q.rear + 1) % MAXSIZE == Q.front) return ERROR;
Q.base[Q.rear] = e;
Q.rear = (Q.rear + 1) % MAXSIZE;
return OK;
}
//循环队列出队
Status DeQueue(SqQueue &Q, QElemType &e) {
if (Q.front == Q.rear) {
return ERROR;
}
e = Q.base[Q.front];
Q.front = (Q.front + 1) % MAXSIZE;
return OK;
}
//遍历队列
void DisplayQueue(SqQueue Q) {
int i = Q.front;
printf("队列元素为: ");
while (Q.front != Q.rear && (i + MAXSIZE) % MAXSIZE != Q.rear) {
printf("%d ", Q.base[i]);
i++;
}
}
//功能菜单列表
void show_help() {
printf("******* 功能菜单列表 *******\n");
printf("1----入队------------------\n");
printf("2----求循环队列长度----------\n");
printf("3----出队------------------\n");
printf("4----取队头元素-------------\n");
printf("5----清空循环队列-----------\n");
printf("6----销毁循环队列-----------\n");
printf("7----判断循环队列是否为空-----\n");
printf("8----批量插入元素------------\n");
printf("9----显示队列元素------------\n");
printf("10----退出------------------\n\n");
}
int main() {
SqQueue sq;
//初始化
Status rInitStack = InitQueue(sq);
if (rInitStack == OK) {
printf("循环队列初始化成功!\n");
} else {
printf("循环队列初始化失败!\n");
}
while (1) {
//功能菜单列表
show_help();
int flag;
printf("请输入所需的功能编号:\n");
scanf("%d", &flag);
switch (flag) {
case 1: {//入队
Status EnQueueindex;
printf("请输入插入元素(请在英文状态下输入例如:1): \n");
scanf("%d", &EnQueueindex);
Status rEnQueue = EnQueue(sq, EnQueueindex);
if (rEnQueue == OK) {
printf("向循环队列入队%d成功!\n", EnQueueindex);
} else {
printf("向循环队列入队失败!\n");
}
}
break;
case 2: {//求循环队列的长度
int length = QueueLength(sq);
printf("循环队列的长度为:%d。 \n\n", length);
}
break;
case 3: {//出队
Status DeQueueindex;
Status rDeQueue = DeQueue(sq, DeQueueindex);
if (rDeQueue == OK) {
printf("向循环队列出队%d成功!\n", DeQueueindex);
} else {
printf("向循环队列出队失败!\n");
}
}
break;
case 4: {//求队头元素
Status topData;
Status rGetHead = GetHead(sq, topData);
if (rGetHead == OK) {
printf("向循环队列获取队头元素:%d\n", topData);
} else {
printf("向循环队列获取队头元素失败!\n");
}
}
break;
case 5: { //清空
Status rClearStack = ClearQueue(sq);
if (rClearStack == OK) {
printf("循环队列清空成功!\n");
} else {
printf("循环队列清空失败!\n");
}
}
break;
case 6: {//销毁
Status rDestroyStack = DestroyQueue(sq);
if (rDestroyStack == OK) {
printf("循环队列销毁成功!\n");
} else {
printf("循环队列销毁失败!\n");
}
}
break;
case 7: {///判空
Status ClearStatus = QueueEmpty(sq);
if (ClearStatus == true) {
printf("循环队列为空!\n\n");
} else {
printf("循环队列不为空!\n\n");
}
}
break;
case 8: {//批量插入
int on;
printf("请输入想要插入的元素个数:\n");
scanf("%d", &on);
QElemType array[on];
for (int i = 1; i <= on; i++) {
printf("向循环队列第%d个位置插入元素为:", i);
scanf("%d", &array[i]);
}
for (int i = 1; i <= on; i++) {
Status InsertStatus = EnQueue(sq, array[i]);
if (InsertStatus == OK) {
printf("向循环队列第%d个位置插入元素%d成功!\n", i, array[i]);
} else {
printf("向循环队列第%d个位置插入元素%d失败!\n", i, array[i]);
}
}
}
break;
case 9: {//输出链表元素
DisplayQueue(sq);
printf("\n");
}
break;
case 10: {//退出程序
return 0;
}
break;
default: {
printf("输入错误,无此功能,请检查输入:\n\n");
}
}
}
return 1;
}