# 跑馬燈~~

#include <windows.h>
#include <cstring>
#include <iostream>
using namespace std;
int main()
{
    char A[] = "ABCD              ";
    int c=0;
    while(1)
    {
        cout<<'\r';
        for(int i=0,j=strlen(A);i<strlen(A);i++)
        {
            cout <<A[(i%j+c)%j];
        }
        c++;
        Sleep(100);


    }

}