int abs(int v) { int t = v >> 31;//取符号位,整数为0,负数为-1 return (v^t) - t;//整数异或0本身;负数异或-1取反+1就是绝对值 }
posted on 2015-03-26 15:54 jec 阅读(1148) 评论(0) 编辑 收藏 举报
Powered by: 博客园 Copyright © 2024 jec Powered by .NET 8.0 on Kubernetes