C++

Conditional compilation is more than C # in Java, but after I consult with my predecessors, they all say that Conditional compilation is not very useful in actual project development. in view of the new content, I still take notes and understand it.

The reference type contains value type fields. After the reference type is initialized, the value type is initialized to 0 and null by default. CLR allows you to define the constructor for the value type. However, when calling the constructor, you

This article focuses on how to use C ++ in XCODE to develop the cache function running in IOS. The algorithm is based on LRU (least recently used ). For details about lru, refer: Http://en.wikipedia.org/wiki/Page_replacement_algorithm#Least_recently_

For example, a function chat (link & a); chat (ling * a); the former introduces an address to form a parameter. Can it put a pointer Variable p .. So using chat (p); what is the difference between it and the second function? It is the transfer

Today, I saw some summary of the static Keywords of c ++ and some storage locations of code. I can take a look at it if I have time, you can extract it by yourself. The static function of C ++ has two usage methods: static in process-oriented

Reading and setting xml configuration files is the most common operation. I tried several C ++ XML parsers. I personally think TinyXML is the most comfortable to use, because its API interface is very similar to Java, It is very

The method marked with the virtual keyword is called a virtual method. If the subclass wants to change the implementation details of the virtual method, the override keyword must be used. Abstract class Abstract keywords Prevents meaningless

Api functions: Copy codeThe Code is as follows: 1. [DllImport ("user32.dll")] // retrieves a device 2. private static extern IntPtr GetDC (IntPtr hwnd); // return the device scenario handle 3. [DllImport ("gdi32.dll")] // obtain the specified

First, understand what a two-way linked list is. The so-called two-way linked list is that if you want to find the direct precursor node and the time complexity of the direct successor node is O (1), you need to set two reference fields in the node,

I. What are the C ++ header files? Each C ++/C program is generally divided into two files. A file is called a header file to save the declaration of a program. Another file is used to save the implementation of the program, known as the definition

Character group: various characters that may appear in the same seat. Use a regular expression to determine numeric characters: Re. Search ("[0123456789]", charStr )! = None [0123456789] is a regular expression in the form of a string. It is a

The preceding section provides a brief overview and introduction of data structures and algorithms. In this article, we will introduce a typical data structure-linear structure. What is a linear structure? A linear structure is the simplest, most

The subsequent content will include the following schema: Adapter mode: Match interfaces of different classes synthesis mode (Composite): A tree structure of simple and composite objects decoration mode (Decorator ): add responsibilities to objects

CLR supports two types: reference type and value type. The reference type is always allocated from the managed stack. The New operator in c # returns the memory address of the object. Note: 1. The memory is allocated from the managed heap.2.

Structure: Interface classes that customers can connect:Copy codeThe Code is as follows: class Target{Public virtual void Request (){Console. WriteLine ("common request! ");}} Interfaces that customers can use only by using the adapter:Copy

Its value is determined during compilation. The compiler saves constants to the Assembly metadata. All primitive types recognized by the compiler can only be constants. A constant is regarded as a part of a class and is used to see static members.

Structure: Memento class: the container that saves the statusCopy codeThe Code is as follows: class Memento{Public string State {get; set ;}Public Memento (string state){This. State = state;}} Caretaker is the class for saving Memento:Copy codeThe

The main function is to set the initialization of static fields in the type. The Type constructor does not have to be defined in the class, but can have only one. Example: Copy codeThe Code is as follows: class SomeType { Static SomeType (){} }

Copy codeThe Code is as follows: String [,] items = New String [,] { { {"A1", "A2", "A3", "☆"," ○ "}, {"B1", "B2", "B3", "☆"," ○ "}, {"C1", "C2", "C3", "☆"," ○ "}, {"D1", "D2", "D3", "☆"," ○ "} },{ {"E1", "E2", "E3", "☆"," ○ "}, {"F1", "F2", "F3", "☆

Array Overview C # create an index for the array from scratch, that is, the array index starts from scratch. In C #, arrays work in a similar way as in most other popular languages. However, some differences should be noted.When declaring an array,