从两边向中间依次靠拢打印一个字符串

#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
#include<Windows.h>
#include<string.h>


int main()
{
char arr1[] = "*******************";
char arr2[] = " welcome to China! ";
int left = 0;
int right = strlen(arr1) - 1;     //sizeof(arr1)/sizeof(arr[0])-2
printf("%s\n", arr1);
Sleep(1000);  //睡眠函数，使得字符串每隔一秒打印一行
while (left <= right)
{
arr1[left] = arr2[left];
arr1[right] = arr2[right];
Sleep(1000);
printf("%s\n", arr1);
left++;
right--;
}
system("pause\n");
return 0;
}