#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	int arr[] = { 1,2,3,4,5,6,7,8,9,10 };
	int sz = sizeof(arr) / sizeof(arr[0]);
	printf("%d\n", sz);//计算数组个数
	for (int i = 0; i < sz; i++)
	{
		printf("%d ", arr[i]);//正序打印
	}
	printf("\n");
	int left = 0;
	int right = sz - 1;
	while (left < right)
	{
		int tmp = arr[left];
		arr[left] = arr[right];
		arr[right] = tmp;
		left++;
		right--;
	}//逆序程序
	for (int i = 0; i < sz; i++)
	{
		printf("%d ", arr[i]);//逆序打印
	}
}