参考:https://blog.csdn.net/yzl_rex/article/details/7600906 https://blog.csdn.net/acm_JL/article/details/50200355 https://blog.csdn.net/qq_35040828/article/details/71123521 https://zhidao.baidu.com/question/49762862.html #include <iostream> #include &l…