DS\队列操作集合
1.循环队列（顺序队列）#include<stdio.h>#include<stdlib.h>
#define MAXSIZE 5
typedef char ElemType;
typedef struct CycleQueue
{
ElemType *base;
int front;
int rear;
}CycleQueue;
void InitQueue(CycleQueue *q)
{
q->base = (ElemType *)malloc(MAXSIZE*sizeof(ElemType));
if(!q->base)
{
printf("InitQueue:initialize falied!");
exit(0);
}
q->front = q->rear = 0;
}
void InsertQueue(CycleQueue *q,ElemType e)
{
if((q->rear+1)%MAXSIZE ==q->front)
return;
q->base = e;
q->rear = (q->rear+1)%MAXSIZE;
}
void DeleteQueue(CycleQueue *q,ElemType *e)
{
if(q->front == q->rear)
return;
*e = q->base;
q->front = (q->front+1)%MAXSIZE;
}
int main()
{
char e;
CycleQueue s;
InitQueue(&s);
printf("请输入<#结束>:");
e = getchar();
while(e != '#')
{
InsertQueue(&s,e);
e = getchar();
}
printf("打印队列中的元素：");
while(s.front != s.rear)
{
DeleteQueue(&s,&e);
printf("%c",e);
}
printf("\n");
return 0;
}2.链队列
#include<stdio.h>
#include<stdlib.h>
typedef char ElemType;
typedef struct QNode
{
ElemType data;
struct QNode *next;
}QNode,*QueuePtr;
typedef struct LinkQueue
{
QueuePtr front,rear;
}LinkQueue;
void InitQueue(LinkQueue *q)
{
q->front = q->rear=(QueuePtr)malloc(sizeof(QNode));
if(!q->front)
{
printf("Initialization failed!");
exit(0);
}
q->front->next = NULL;
}
void InsertQueue(LinkQueue *q,ElemType e)
{
QueuePtr p;
p = (QueuePtr)malloc(sizeof(QNode));
if(p==NULL)
{
printf("InsetQueue:initialize p failed!");
exit(0);
}
p->data = e;
p->next = NULL;
q->rear->next = p;
q->rear = p;
}
void DeleteQueue(LinkQueue *q,ElemType *e)
{
QueuePtr p;
if(q->front == q->rear)
return;
p = q->front->next;
*e = p->data;
q->front->next = p->next;
if(q->rear == p)
q->rear = q->front;
free(p);
}
void DestroyQueue(LinkQueue *q)
{
while(q->front)
{
q->rear = q->front->next;
free(q->front);
q->front = q->rear;
}
}
int main()
{
LinkQueue s;
ElemType c,d,e;
InitQueue(&s);
printf("请输入整数<#结束>:");
scanf("%c",&c);
while(c != '#')
{
InsertQueue(&s,c);
scanf("%c",&c);
}
getchar();
printf("打印队列中的元素：");
while(s.front != s.rear)
{
DeleteQueue(&s,&e);
printf("%c",e);
}
printf("\n");
return 0;
}
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