有序数组查找某数

#define _CRT_SECURE_NO_WARNINGS
#include 

int main()
{
	int sz [] = { 1,2,3,4,5,6,7,8,9 };
	int x = 0;
	printf("输入查找的数字：n");
	scanf("%d", &x);
	
	int left = 0;
	int  right = sizeof(sz) / sizeof(sz[0]) - 1;
	int mid = 0;
	while (left<=right)
	{
		int mid = (right + left) / 2;
		if (x ==sz[mid])
		{
			printf("这个数的下标为：%dn", mid);
			break;	
		}
		else if (x > sz[mid])
		{
			left = mid + 1;
		}
		else if (x < sz[mid])
		{
			right = mid - 1;
		}	
	}
	if (right