bit

How Does The Bitwise & (AND) Work In Java?

前提是你 提交于 2020-05-19 08:30:13
问题 I was reading through some code examples and came across a & on Oracle's website on their Bitwise and Bit Shift Operators page. In my opinion it didn't do too well of a job explaining the bitwise & . I understand that it does a operation directly to the bit, but I am just not sure what kind of operation, and I am wondering what that operation is. Here is a sample program I got off of Oracle's website: http://docs.oracle.com/javase/tutorial/displayCode.html?code=http://docs.oracle.com/javase

How can I merge two ASCII characters? [closed]

非 Y 不嫁゛ 提交于 2020-05-09 17:27:16
问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed last month . I want to merge two characters and print them via a single variable by using ASCII (refer to the image below): [1]: https://i.stack.imgur.com/TWodP.jpg 回答1: try this if your machine is little endian unsigned int C = (b << 8) | a; printf("%s",&C); otherwise if your machine is big endian try unsigned

Why is 1 Byte equal to 8 Bits? [closed]

烂漫一生 提交于 2020-05-08 03:43:10
问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 3 years ago . Why not 4 bits, or 16 bits? I assume some hardware-related reasons and I'd like to know how 8bit 1byte became the standard. 回答1: I'ts been a minute since I took computer organization, but the relevant wiki on 'Byte' gives some context. The byte was originally the smallest

Why is 1 Byte equal to 8 Bits? [closed]

时光怂恿深爱的人放手 提交于 2020-05-08 03:42:05
问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 3 years ago . Why not 4 bits, or 16 bits? I assume some hardware-related reasons and I'd like to know how 8bit 1byte became the standard. 回答1: I'ts been a minute since I took computer organization, but the relevant wiki on 'Byte' gives some context. The byte was originally the smallest

Go语言规范(类型)

百般思念 提交于 2020-04-07 12:30:10
原文: http://golang.org/doc/go_spec.html 翻译: 红猎人 (zengsai@gmail.com) Boolean types 布尔类型 A boolean type represents the set of Boolean truth values denoted by the predeclared constants true and false . The predeclared boolean type is bool . 布尔类型由预定义的常量 true 和 false 组成,预定义的布尔类型是 bool。 Numeric types 数字类型 A numeric type represents sets of integer or floating-point values. The predeclared architecture-independent numeric types are: 数字类型代表一个数字或浮点值的集合。预定义的类型是: uint8 the set of all unsigned 8-bit integers (0 to 255) uint16 the set of all unsigned 16-bit integers (0 to 65535) uint32 the set of all

部分中断相关函数浅析

为君一笑 提交于 2020-04-05 23:37:12
1. /kernel/irq.c softirq_init 2.6.32.25 1.1 for_each_possible_cpu for ( ( ( cpu ) ) = - 1 ; ( ( cpu ) ) = cpumask_next ( ( ( cpu ) ) , ( cpu_possible_mask ) ) , ( ( cpu ) ) < nr_cpu_ids ; ) 1.2 per_cpu(tasklet_vec, cpu); //取per_cpu_tasklet_vec[cpu],即cpu的tasklet_vec结构。 per_cpu (tasklet_vec, cpu); ( * ( { unsigned long __ptr ; __ptr = ( unsigned long ) ( ( & per_cpu__tasklet_vec ) ) ; ( typeof ( ( & per_cpu__tasklet_vec ) ) ) ( __ptr + ( ( ( __per_cpu_offset [ cpu ] ) ) ) ) ; } ) ) ; 1.3 tasklet_vec / tasklet_hi_vec static DEFINE_PER_CPU( struct tasklet_head, tasklet_vec); static DEFINE_PER_CPU(

Verilog -- IIC总线协议

纵饮孤独 提交于 2020-04-04 15:06:47
Verilog -- IIC总线协议 @ 目录 Verilog -- IIC总线协议 简介 读写时序 写时序 读时序 verilog代码设计 IIC发送模块的接口定义与整体设计 SCL标志位创建逻辑 发送逻辑 读逻辑 IIC设备多字节连续读写操作 参考自 https://www.cnblogs.com/liujinggang/p/9656358.html 上面的博文写的很好,下面只是摘录一些重要知识点以及自己的理解。 简介 IIC(Inter-Integrated Circuit)总线是一种由PHILIPS公司开发的两线式串行总线,用于连接微控制器及其外围设备。I2C总线产生于在80年代,最初为音频和视频设备开发,如今主要在服务器管理中使用,其中包括单个组件状态的通信。例如管理员可对各个组件进行查询,以管理系统的配置或掌握组件的功能状态,如电源和系统风扇。可随时监控内存、硬盘、网络、系统温度等多个参数,增加了系统的安全性,方便了管理。IIC数据传输速率有标准模式(100 kbps)、快速模式(400 kbps)和高速模式(3.4 Mbps),另外一些变种实现了低速模式(10 kbps)和快速+模式(1 Mbps)。 需要注意的是IIC总线的数据采集是scl高电平期间,再0电平期间允许sda数据变化。因此是电平敏感的,不是边沿触发类型 。  

Windows API

Deadly 提交于 2020-04-03 23:04:08
做Windows程序开发,一个是MSDN,另一个就是Wikipedia,直接从Google里指定网站搜索,不然真的就是浪费时间。以下就是摘录自Wikipedia的,写的太好了,一目了然! kernel32.dll知道是干吗的了吧? Overview The functionality provided by the Windows API can be grouped into eight categories: [2] Base Services [3] Provide access to the fundamental resources available to a Windows system. Included are things like file systems , devices , processes and threads , and error handling . These functions reside in kernel.exe , krnl286.exe or krnl386.exe files on 16-bit Windows, and kernel32.dll on 32-bit Windows. Advanced Services Provide access to functionality that is an addition on

KubeSphere排错实战(三)

女生的网名这么多〃 提交于 2020-04-02 05:20:02
接上两篇: 《KubeSphere排错实战》 《KubeSphere排错实战二》 在之后使用kubesphere中也记录了一些使用问题,希望可以对其他人有帮助,一块体验如丝般顺滑的容器管理平台。 十四 异常容器删除 之前利用helm部署过consul,后面删除consul [root@master ~]# helm delete consul --purge 经查看consul的一个pod状态一直为 Terminating [root@master ~]# kubectl get pods -n common-service NAME READY STATUS RESTARTS AGE consul-1 1/2 Terminating 1 24d redis-master-0 1/1 Running 1 17d redis-slave-0 1/1 Running 1 8d redis-slave-1 1/1 Running 1 17d 查看状态 [root@master ~]# kubectl describe pods consul-1 -n common-service Events: Type Reason Age From Message ---- ------ ---- ---- ------- Warning FailedSync 3m41s (x4861 over

专题训练之树状数组

一曲冷凌霜 提交于 2020-03-30 09:18:20
推荐几个博客:https://blog.csdn.net/int64ago/article/details/7429868搞懂树状数组 https://blog.csdn.net/z309241990/article/details/9615259区间修改 https://blog.csdn.net/whereisherofrom/article/details/78922383完整版+题集 http://www.cnblogs.com/wuyiqi/archive/2011/12/25/2301071.html二进制思想求第k大数 http://www.cnblogs.com/oa414/archive/2011/07/21/2113234.html二分/二进制思想求第k大数 一维树状数组模板(区间求和、单点修改) 1 #include<cstdio> 2 #include<cstring> 3 #include<algorithm> 4 using namespace std; 5 const int maxn=1e5+10; 6 int bit[maxn],n; 7 8 int lowbit(int x) 9 { 10 return x&(-x); 11 } 12 13 void add(int k,int num) 14 { 15 while ( k<=n ) { 16