题目：多个字符从两端移动，向中间汇聚

#include<stdio.h>
#include<windows.h>
#include<string.h>

int main()
{
	char arr1[] = "Good Good Study,Day Day Up!" ;
	char arr2[] = "***************************";
	int left = 0;
	size_t right = strlen(arr1) - 1;

	while (left <= right)
	{
		arr2[left] = arr1[left];
		arr2[right] = arr1[right];
		printf("%s\n", arr2);
		Sleep(500);//单位是毫秒，休眠一下，就是这次打印与下次打印有一定的时间差，产生停顿的感觉
		system("cls");//清屏，清除掉上一次的打印，实现空屏的效果
		left++;
		right--;
	}

	printf("%s\n", arr2);

	return 0;
}