二叉树顺序存储

该存储结构适用于 完全二叉树，非完全二叉树会造成空间浪费

#include 
#include 
#include 
#include 
#pragma warning (disable:4996)

#define MAX_TREE_SIZE 100
#define OK 0
#define ERROR -1
typedef int status;
typedef int elemtype;  

typedef elemtype sqbitree[MAX_TREE_SIZE];

typedef struct {
	int level;
	int order;
}position;

status initbitree(sqbitree t) {
	if (t == NULL) return ERROR;
	int i;
	for (i = 0;i < MAX_TREE_SIZE;i++)
		t[i] = 0;
	return OK;
}

status clearbitree(sqbitree t) {
	if (t == NULL) return ERROR;
	int i;
	for (i = 0;i < MAX_TREE_SIZE;i++)
		t[i] = 0;
	return OK;
}

status createbitree(sqbitree t) {  //如果i>=MAX_TREE_SIZE会出现错误
	if (t == NULL)return ERROR;
	int i = 0;
	printf("请按层序输入结点的值(整型)，0表示空结点，输999结束。结点数≤%d:\n", MAX_TREE_SIZE);
	while (1) {
		scanf("%d", &t[i]);
		if (t[i] == 999)break;
		if (i != 0 && t[i] != 0 && t[(i + 1) / 2 - 1] == 0) {
			printf("出现结点存在，但是双亲为空的情况");
			return ERROR;
		}
		i++;
	}
	while (i < MAX_TREE_SIZE) {
		t[i] = 0;
		i++;
	}
	return OK;
}

int bitreedepth(sqbitree t) {
	if (t == NULL)return -1;
	int i, j = -1;
	for (i = MAX_TREE_SIZE - 1;i >= 0;i--)
		if (t[i] != 0) break;
	i++;
	do
	{
		j++;
	}while (i >= pow(2, j));
	return j;
}


int main() {
	sqbitree bt;
	initbitree(bt);
	createbitree(bt);
	int depth = bitreedepth(bt);
	printf("%d\n", depth);
	system("pause");
}