摘要: http://www.cplusplus.com/reference/ios/ios/operator_not/http://stackoverflow.com/questions/8117566/why-istream-object-can-be-used-as-a-bool-expression... 阅读全文
posted @ 2014-11-17 15:39 rldts 阅读(572) 评论(0) 推荐(1) 编辑