樹的雙親孩子表示法

#include<stdio.h>
#include<stdlib.h>
#include<malloc.h>
#define MAX_SIZE 100

typedef struct childNode
{
	int child_id;
	struct childNode* next;
}cNode;

typedef struct headNode
{
	int head_id;
	cNode* firstPtr;
	int parent_id;
}hNode;

typedef struct Tree
{
	hNode headArray[MAX_SIZE];
	int r, n;
}myTree;


cNode* phead = NULL;
cNode* ptail = NULL;

void InitFirstNode()
{
	phead = (cNode*)malloc(sizeof(cNode));
	phead->child_id = 0;
	phead->next = NULL;
}

void InitTree(myTree* mytree)
{
	mytree->r = -1;
	printf("請輸入結點個數：");
	scanf("%d", &mytree->n);

	for (int i = 0; i < mytree->n; i++)
	{
		printf("請輸入第%d個結點編號：", i+1);
		scanf("%d", &mytree->headArray[i].head_id);
		printf("請輸入第%d個結點的雙親id：", i + 1);
		scanf("%d", &mytree->headArray[i].parent_id);

		//爲指針分配空間
		mytree->headArray[i].firstPtr = (cNode*)malloc(sizeof(cNode));
		mytree->headArray[i].firstPtr->next = NULL;

		printf("請輸入當前第%d個結點共有多少個子結點：", i+1);
		int nums = 0;
		scanf("%d", &nums);

		if (nums)
		{
			ptail = mytree->headArray[i].firstPtr;

			for (int i = 0; i < nums; i++)
			{
				cNode* new_node = (cNode*)malloc(sizeof(cNode));
				new_node->next = NULL;

				printf("請輸入第%d個子結點的id: ", i + 1);
				scanf("%d", &new_node->child_id);

				ptail->next = new_node;
				ptail = new_node;
			}
		}

	}
}

void findNodeAllKids(myTree* mytree, int id)
{
	int flag = 0;
	for (int i = 0; i < mytree->n; i++)
	{
		if (mytree->headArray[i].head_id == id && mytree->headArray[i].firstPtr != NULL)
		{
			flag = 1;
			cNode* ptmp = mytree->headArray[i].firstPtr->next;

			while (ptmp != NULL)
			{
				printf("第%d個子結點id爲：%d\n", i+1, ptmp->child_id);
				ptmp = ptmp->next;
			}
		}
	}
	if (!flag)
	{
		printf("木得子結點");
	}
}

void findParent(myTree* mytree, int id)
{
	for (int i = 0; i < mytree->n; i++)
	{
		if (mytree->headArray[i].head_id == id && mytree->headArray[i].parent_id != -1)
		{
			printf("雙親結點id爲：%d\n", mytree->headArray[i].parent_id);
		}
	}
}

int main(void)
{
	myTree mytree;
	InitFirstNode();
	InitTree(&mytree);

	findNodeAllKids(&mytree, 1);
	findParent(&mytree, 2);


	system("pause");
	return 0;
}