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Zookeeper 1 fork () function The sub-process copies the 0-3g space of the parent process and the PCB in the parent process kernel, but the ID number is different. A fork call returns two times at a time, which has the following features: A: The child process ID is returned from the parent process. B: The sub-process returns 0. C: shared during read and copy during write 2 fork ()-dependent header file # Include 3 fork ()

virtual functions are defined in the base class for overload and polymorphism, and can be overridden or not written in a base class, even if the definition is null. pure virtual functions are not defined in the base class and must be implemented in subclasses, much like Java the interface function in. virtual function Introduction Reason: In order to facilitate the use of polymorphic features, we often ne

Usingsystem;usingsystem.collections.generic;usingsystem.linq;usingsystem.text;using system.threading.tasks;namespaceconsoleapplication1{classprogram{ staticintval; //function //1. keyword static: static function, void: no return value, Return: The program returns the calling code immediately; //instance 1: function Parameters staticdoubleproduct (DOUBLENBSP;PARA

I. Lambda anonymous function (one line for a function, but not a complex function operation)Syntax: function name = lambda parameter: return valueAttention:1. Functions can have more than one argument, separated by commas2. Anonymous functions no matter how complex, can only write one line, and the logic is finished di

sheets ', ' 370322199109011234 ', ' Class three ', 60,50,40, ' male ')INSERT into XS values (1, ' John Doe Li ', ' 370322199110011234 ', ' Class three ', 61,51,41, ' female ')INSERT into XS values (1, ' Harry King ', ' 370322199111011234 ', ' Class three ', 62,52,42, ' male ')INSERT into XS values (1, ' Zhao Liu Zhao ', ' 370322199112011234 ', ' Class three ', 63,53,43, ' female ')GoSelect *from XSALTER TABLE XS Add [Xingbie]char (10)--Add columnGoSelect *from XSALTER TABLE XS drop column [Xing

function In JavaScript, a function is also a data type, and there are two ways to define a function: function f () {return 1;} var f=function () {return 1;} So, the function in JavaScript is a kind of data, but it has two impor

Reclaim process user space resource exit () function _ exit () function atexit () function on_exit () function, _ exitatexitAbstract:This article describes how to terminate a process and how to use the exit () function to terminate the process and reclaim the user space reso

development of function declarations 1 implicit function Declaration implicit function declarationThe main function and the printf function return value type int, if not declared, the compiler default function return value is the

JavaScript is an interpreted language, and function declarations are interpreted after the JavaScript code is loaded and executed, and the function expression is interpreted only when it executes to this line of code.There are two ways to define a function in JS,1 Yes: var aaa=function () {...}2 Yes: