摘要:
如果cin出现了问题,那么cin调用fail()就会返回真,进入循环后处理错误信息 阅读全文
摘要:
输出为1 阅读全文
摘要:
Being unique is so important to people on Mars that even their lottery is designed in a unique way. The rule of winning is simple: one bets on a numbe 阅读全文