实现字符替换并打印

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

int main()
{
    char arr1[] = { "welcome to c world, keep runing !!!"};
    char arr2[] = { "***********************************" };
    int left = 0;
    int right = strlen(arr1)-1;//strlen()函数是用来计算字符串长度的
    while (left <= right)
    {
        arr2[left] = arr1[left];
        arr2[right] = arr1[right];
        printf("%s\n", arr2); 
        Sleep(1000);//暂停一秒，1000毫秒等于一秒
        system("cls");//执行系统命令的一个函数-cls-清空屏幕
        left++;
        right--;
    }
    printf("%s\n", arr2);
    return 0;
}