queue.cpp

来自「掌握循环队列的基本操作及在顺序存储结构上的实现。数据结构」· C++ 代码 · 共 79 行

#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>
#include "Queue.h"

void QueueInitial(CircSeqQueue pQ)
{
	pQ->front=pQ->rear=0;
}

int IsEmpty(CircSeqQueue pQ)
{
	return pQ->front==pQ->rear;
}

int IsFull(CircSeqQueue pQ)
{
	return (pQ->rear+1)%MaxSize==pQ->front;
}

void EnQueue(CircSeqQueue pQ,ElemType e)
{
	if (IsFull(pQ))
	{
		printf("队列溢出!");
		exit(1);
	}
	pQ->rear=(pQ->rear+1)%MaxSize;
	pQ->data[pQ->rear]=e;
}

ElemType DeQueue(CircSeqQueue pQ)
{
	if (IsEmpty(pQ))
	{
		printf("空队列!");
		exit(1);
	}
	pQ->front=(pQ->front+1)%MaxSize;
	return pQ->data[pQ->front];
}

ElemType GetFront(CircSeqQueue pQ)
{
	if (IsEmpty(pQ))
	{
		printf("空队列!");
		exit(1);
	}
	return pQ->data[(pQ->front+1)%MaxSize];
}

void display(CircSeqQueue pQ)
{
	if (IsEmpty(pQ))
	{
		printf("空队列!\n");
	}
	while (!IsEmpty(pQ))
	{
		printf("%-5c",pQ->data[(pQ->front+1)%MaxSize]);
		pQ->front=(pQ->front+1)%MaxSize;
	}
	putchar('\n');
}

void MakeEmpty(CircSeqQueue pQ)
{
	pQ->front=pQ->rear=0;
}

void Union(CircSeqQueue pQ1,CircSeqQueue pQ2)
{
	while (!IsEmpty(pQ2))
	{
		EnQueue(pQ1,pQ2->data[(pQ2->front+1)%MaxSize]);
		pQ2->front=(pQ2->front+1)%MaxSize;
	}
}