C++

A. Convert binary into pictureMemoryStream ms = new MemoryStream (bytes);Ms. Position = 0;Image img = image.fromstream (ms);Ms. Close ();This.pictureBox1.Image Two. C # byte[] and string conversion code 1, System.Text.UnicodeEncoding converter = new

Basic concepts: Deep copy: When an object is copied to another object, the assigned object stores an extra copy of the assignment object. If a member of a class contains a pointer member and is initialized with new, the assigned member will apply

The principle of increasing or decreasing PCM audio data is primarily to multiply the sampled data by a number or divide by a number, but pay attention to overflow handling. Implementation of the following C language implementation #define

The question is as follows: Ask the following code to print a result of 0. #include #include using namespace Std; struct CLS { int m_i; CLS (int i): m_i (i) {} CLS () { CLS (0); } }; int main () { CLS obj; cout System ("PAUSE"); return 0; The

C # Performance Optimization--three kinds of string concatenation efficiency String stitching consists mainly of three categories: +,string.format (), Stringbuilder.append () 1 for a small number of fixed string concatenation, such as String s= "a"

inheritance and derivation of C + + classes First, the basic concept 1, class inheritance, is the new class from existing classes there to get the existing characteristics. Or the process of generating a new class from an existing class is the

C # Reflection (Reflection) Reflection refers to the ability of a program to access, detect, and modify its own state or behavior. Assemblies contain modules, and modules contain types, and types contain members. Reflection provides an object that

File operation in 1.C language. File operations in the 2.c++ language. 3.win32 API function file operation. 4.MFC CFile class file operation. 5.MFC CFileDialog The file operation of the class. 6. Registry file operation. Let me elaborate on the

Original (C # multithreading and Events): http://www.codeproject.com/Articles/886223/Csharp-Multithreading-and-Events The ' s ' start off with there are no perfectly safe multithreaded event handling as there are caveats/conditions that Mu St be

As with a reference, you can make the pointer point to a constant or to a very great amount. A pointer to a constant cannot be used to change the value of the object it refers to. The address of the constant object you want to store. You can only

First determine whether the size is the same, if not the same, return false. If, again, compare, if you find a difference, return false. Returns true until the last one is checked; BOOL Compare (const char* p1, const char* p2) { int len =

Today I encountered a ternary operator, instead of writing the value of the second C, I really confused myself. For example: A>b?:c, know if A>B is established, what is returned. After testing found: Return is the result of a>b, in general, if the

To view the original article, please visit: Http://blog.csdn.net/xingjiarong In C, when the pointer operator and + + or-combined can easily be confused in the order of operations, here is a summary of the following 6 combination: * p++, (* p) ++,*

Preface This article's small knowledge point is the C language three-mesh operator, this is a very useful operator, you can see in the Kinetis library function has a lot of applications, this article I will use a familiar example to

In C + +, the specificity of a template enables different processing of different data types: For example, we want to sort the data of type int by a quick sort method. Sort by insertion sort for data of float type Template void sort (T arg[], int

Have learned the basis of C language must know the variables and data types is simple but the knowledge, but there are a few of the foundation of the mire, a little careless on the shattered-programming blocked, the interview was brushed. One is the

The C + + 11 standard Adds a new four unordered associative containers, respectivelyunordered_map Mappingunordered_multimap Multiple mappingsUnordered_set CollectionUnordered_multiset Multiple Sets The same as the basic functions of the normal map

C + + polymorphism is summed up in the following sentence: In the base class of the function plus the virtual keyword, in a derived class to override the function, the runtime will be based on the actual type of the object to call the corresponding

1. The role of intelligent pointers The use of heap memory in C + + programming is a very frequent operation, and the application and release of heap memory are managed by the programmer. Programmers manage heap memory themselves can improve the

BOOL Getlocalip (char* IP) {//1. Initialize WSA wsadata wsadata; int Ret=wsastartup (Makeword (2,2), &wsadata); if (ret!=0) {Retu RN false; //2. Get host name Char hostname[256]; Ret=gethostname (HOSTNAME,SIZEOF (hostname)); if (Ret==socket_error)