a & (n - 1) 等价于 a % n，是取模的典型做法。
摘要：
trace("-1%4",-1%4);trace("0%4",0%4);trace("3%4",3%4);trace("5%4",5%4);trace("9%4",9%4);trace("15%4",15%4);trace("64&4",64%4);trace("-1&4",-1&(4-1));trace("0&4",0&(4-1));trace("3&am... 阅读全文
posted @ 2010-01-13 14:05 jiahuafu 阅读(640) 评论(0) 推荐(0) 编辑
