创建循环双链表





#include <stdio.h>
#include <stdlib.h>

typedef int ItemValue;
typedef struct DoubleLinkedList
{
	ItemValue value;
	struct DoubleLinkedList *pre;
	struct DoubleLinkedList *next;
} DoubleList, *pDoubleList;


DoubleList *CreateCylicDoubleLinkedList()
{
	printf("创建循环双链表!\n");
	DoubleList *head = (DoubleList *)malloc(sizeof(DoubleList));
	head->pre = head;
	head->next = head;

	DoubleList *pTemp;
	pTemp = head;
	ItemValue iValue;
	while (scanf("%d", &iValue) != EOF)
	{
		DoubleList *p = (DoubleList *)malloc(sizeof(DoubleList));
		p->value = iValue;

		p->pre = pTemp;
		p->next = head;
		pTemp->next = p;
		pTemp = p;
		head->pre = p;
	}
	return head;
}
/* 访问循环双链表 */
void VisitCylicDoubleLinkedList(DoubleList *dl)
{
	printf("循环双链表的输出!\n");
	DoubleList *pTemp;
	pTemp = dl;
	while (pTemp->next != dl)
	{
		printf("%d ", pTemp->next->value);
		pTemp = pTemp->next;
	}
}


int main()
{
	DoubleList *DL;
	DL = CreateCylicDoubleLinkedList();
	VisitCylicDoubleLinkedList(DL);

	free(DL);
	system("pause");
	return 0;
}






测试结果:






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