C

This series mainly records what the design pattern intends to be, what issues it wants to solve, and when it can be used; how it solves it, master its structure diagram, remember its key code; be able to think of at least two of its application

After the Declaration and operation of pointers in the previous article, this article describes several common and important pointer concepts.I. pointer constants and constant pointers These two concepts also exist as follows. Like two connected

In php, count ($ arr) is used directly. It is very difficult for a function to determine the number of arrays in c. If php is written in C, you can see how to write the function... Oh, my God, the fact is much more complicated than I thought... 1.

_ QUEUE_H queue_record * enqueue ( MIN_QUEUE_SIZE 5 *-> size =-> front =-> rear = q-> size = q-> (max_elements array = malloc (() * (q-> array =-> capacity = (++ value = q->=-> size ++-> rear = succ (q-> array [q-> rear] =-> size ---> front =

# Include # Include // Define the single-chain table structure body typedef int ElemType; typedef struct Node {ElemType data; struct Node * next;} LNode, * LinkList; // create a single-chain table void Build (LinkList L) {int n; LinkList

Function: separate input characters from the keyboard with spaces. Press enter when q or Q is entered to indicate that the input is complete. Release the main function first. int main(){ MyNode *myNode = (MyNode *)malloc(sizeof(MyNode));

Next, let's take a look at the memory management of some syntaxes.(1) Assignment  Assign: direct value assignment, default Retain: Reserved object Copy: copy objectSample Code:@ Property (assign) Person * person;@ Synthesize

". The memory marked by LC0 is located in the static allocation Area of the application. This area is allocated after the program runs, that is, "hello, world" is arranged as a C-language String constant in the static allocation area. Another very

Header file Vmath. h # Ifndef _ VMATH_H # define _ VMATH_H # ifdef _ fill "C" {# endiftypedef float Matrix44f [16]; void translate (Matrix44f M, float x, float y, float z ); void scale (Matrix44f M, float x, float y, float z); void rotateX (Matrix44

Basic concepts:The Singleton design mode is one of the more common and widely used and simple design modes. Its design principle isAlways Returns an instance, that is, a class always has only one instanceBasic Steps for creating a singleton Design

1. Protocol proxy A.h #import @class ViewControllerA;@protocol ViewControllerAdelegate-(void)changeBgColorFromCtrlA:(ViewControllerA *)aView withColor:(UIColor *)color;@end@interface ViewControllerA : UIViewController@property( assign,

Thread Pool shared memory + semaphoreDeepfuture @ deepfuture-laptop :~ /Private/mytest $ gcc-std = gnu99-o testshm. cTestshm. c: In function 'main ':Testshm. c: 38: warning: implicit declaration of function 'secet'Testshm. c: 41: warning: implicit

Commands in Linux are divided into two types: Internal commands and external commands. Internal commands are implemented by Shell programs, such as cd and echo. Linux has a limited number of internal commands, and most of them are rarely used. Every

C language pre-compilation includes three types: 1. macro definition 2. file contains 3. Conditional compilation, which refers to compiling only when certain conditions are met. It has several forms: (1) # ifdef identifier // Program # Else //

1. the const modifier in const C language, which is less disgusting than C ++, is used to modify the const attribute of a variable. Variables modified by const in C language have read-only attributes and cannot be modified. Variable modified by

Zookeeper C-compiled programs are not as strict as other advanced languages, leaving the programmer with "flexibility ", however, due to this flexibility, debugging of the program is inconvenient. Especially for beginners of C language, errors that

I have learned basic data types before. However, these basic urban data types are not objects. Therefore, messages cannot be sent to them. And sometimes they need to be processed as objects. Instead, we need to put basic data types into the

The NSMutableString object inherits from the NSString object, that is, this method has all the methods of NSString and has its own unique methods.As follows:1: Insert a string // Insert the string NSMutableString * string19 = [[NSMutableString alloc]

Memory Management Mechanism in cocoa-reference count Cocoa provides a mechanism to implement the above logical model, known as "reference count" or "Reserved count ". The value of the reference count indicates that several "persons" of the object

Basic concepts of proxy Design PatternsProxy refers to the response that an object provides the opportunity to change its behavior in another object.In short, the default basic idea of proxy design-two objects work together to solve the problem,