how to write function

1. First look at the definition of device_attr #define DEVICE_ATTR (_name, _mode, _show, _store) struct Device_attribute dev_attr_# #_name = __attr (_name , _mode, _show, _store) _name: Name, which is the name of the file that will be generated in

First, tool preparation 1. Redis for Windows download Https://github.com/MSOpenTech/redis 2. PHP Extended Download http://pecl.php.net/package-stats.php (Redis and Igbinary) PHP 7 Extended Download http://windows.php.net/downloads/pecl/snaps/redis/20

The language file system is called a stream file (stream), text stream (body file), binary stream (binary file) buffer and non-buffered file sequence operation file and random operation file sequence file: Read/write the K block before

Data block read-write function fread and fwrite The C language also provides a read-write function for the entire block of data. Can be used to read and write a set of data, such as an array element, the value of a struct variable, and so on. The

I learned sparse, this article only for the introduction, Welcome to the road Daniel come to treatise, greatly appreciated!Now the frameworks are modular, and even the front-end JavaScript is no exception. Each module is responsible for a certain

1. Readn and Writen　　1.1 Base Consolidation : Return values for read and write functions1.1.1 Read function prototype is: ssize_t read (int fd, void* buf, size_t count); (void * In standard C means that a pointer of any type can assign a value to it,

The relationship between abstract classes and abstract methodsClasses with abstract methods must be abstract classes; Abstract classes do not necessarily have abstract methodsWhen subclasses inherit abstract classes, they must all implement (or

To write a driver, first understand what type of device it is. The devices under Linux are divided into three categories: character devices, block devices, and network devices. Character device type is based on whether a character stream for the

Linux C Advanced Programming file Operation system CallsTenet: Technical learning is limited, sharing the spirit of unlimited!Library functions are functions that perform certain functions, usually published by a standard organization, and form

Original URL: http://www.cnblogs.com/geneil/archive/2011/12/08/2281367.htmlI. Unified addressing and independent addressingThis part comes from: http://blog.chinaunix.net/space.php?uid=21347954&do=blog&id=443670, thanks to Mason_hu for sharing.From

This article mainly introduces the application of JavaScript in the implementation of delayed loading method, using the REQUIREJS framework, the need for friends can refer to the Both simple and complex web applications are made up of HTML,

The pipeline is the earliest form of inter-process communication between UNIX, which exists in all UNIX implementations. For piping, there are a few things to know about this:1, it is half-duplex, that is, the data can only flow in one direction.

OverviewIn this chapter, we study the HashMap.We first have a general understanding of HashMap, and then learn its source code, and finally through the example to learn to use HashMap. The content includes:Part 1th introduction of HashMapPart 2nd

1, function 1.1, the way of programming:（1）面向对象 -->华山派 -->独门秘籍：类 -->定义关键字：class（2）面向过程 -->少林派 -->独门秘籍：过程 -->定义关键字：def（3）函数式编程 -->逍遥派 -->独门秘籍：函数 -->定义关键字：def1.2. What is a

This talk begins with the most important concepts in object-oriented design-classes, and some of the knowledge derived from classes.In the process-oriented design, the module of the program is composed of functions, and the program module in

This time besides the ELF program comes with a dynamic link libraryLook first, very general protection.Thinking analysisViewed in Ida, you can determine the overflow by entering BUF with the Read function, but you do not see the appropriate target

Calling exit (1) and REUTRN 1 in main is equivalent.The only way for the kernel to start a process is to call exec, and the only way the user program terminates the process is to display or implicitly invoke _exit or exit.Each process will have a

Both simple and complex web applications are made up of HTML, JavaScript, and CSS files. Developers typically use a third-party JavaScript framework such as jquery, knockout, underscore, etc. to improve development speed. Because these JavaScript

cout output Format Control If you want to add a format controller to the output stream, load the header file: #include There are more iomanip in this:It's mainly about manipulating operators like cin,cout, such as setfill,setw,setbase,setprecision

What is a function? function is the basic unit of program Realization Modular programming, generally is to complete a certain function of the set of statements, it can improve the readability and maintainability of the program, disease can improve