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C + + Supplements--c++ Multithreading IntroductionPrefaceThe C + + library file also provides support for multithreading, which mainly includes the header file thread to use multithreading in C + +. Some of its multithreading-related methods differ from the C language. We need to discuss how to use multithreading under C + + programming.Body1. ExampleAs with the C-language multithreading introduction, let's look at a C + + multi-threading example firs

C + + Supplements-Multithreading: the introduction of multithreadingObjectiveMultithreading is an important part of programming. Multi-core era makes multithreading known as a possibility, obviously, one thing many people do, efficiency will certainly improve. Let's look at how multithreading is used in C language.BodyLet's look at an example first#define _crt_secure_no_warnings#include RunThree windows were ejected asynchronously, and the respective

C + + Supplements-Multithreading: The main thread synchronizes with child threadsPrefaceIn multithreaded programming, it is sometimes necessary to require the main thread to synchronize with the child thread.BodyProgram DemoThe following example illustrates the synchronization problem between the main thread and the child thread.Program Description:In the main thread, there is an integer variable count, initialized to 0. The main thread passes the add

C + + Supplements--the principle of virtual functionObjectiveC + + 's polymorphism relies on virtual functions to implement. If a class has virtual functions, each instance of the class maintains an address that points to the virtual function table. The virtual function table holds the addresses of all virtual functions in the class. Here we find the address of the virtual function table, get the address of each virtual function, and then call the vir

C + + supplements--malloc free vs. new DeletePrefaceIn c we often use malloc and free to dynamically allocate and release memory, which corresponds to new and delete in C + +. Here we are going to discuss their differences.Body1. Built-in typeDebug the same code to see the memory#include DebuggingThe same functionality uses new and delete to manipulate#include ModeFor built-in types, the effect is the same for both sets of operations.2. Class TypeCode

C + + supplements--positioning the new expressionPrefaceThe new expression, by default, opens up the memory to the heap area. Using the positional new expression, you can construct an object in the specified address area (stack, heap, static), which is akin to opening the memory to a specified area.Bodylocating the common form of the new expression New (address) type; New (address) type (initializers); New (address) type[size]; Ne

Tag: Bind adapter Function BindingC + + supplements--bind function bindingPrefaceThe BIND function binds a fixed parameter to a known function to form a new function, thereby reducing the number of arguments and reducing the difficulty of calling the function. It should be noted that Bind is a function adapter.bind functionInstance#include Run7 9The example is very simple and everyone can understand it at a glance. But it is necessary to explain:1. Wh

C + + supplements--LAMBDA expressionsPrefaceSometimes, we need to use a function frequently within a function. At this point, we can write this function as a separate function. In fact, this new function is probably not required to be called elsewhere. We want to limit its scope, preferably limited to the current function. The interior of the function is not allowed to redefine other functions. To solve this problem, in the new standard, C + + introdu

C + + supplements--this pointersPrefaceWhen using C + + for object-oriented programming, this pointer is something that everyone knows. But do we really know about it? Here we discuss the significance of its existence and how to use it.This pointerExistence Meaning: Why do we need this pointer?To see a simple example#include RunThis example is simply too simple! Everyone can see with their toes. We need to think deeply about:There is no this parameter

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C + + supplements-class member pointersPrefaceThe type of a class member differs from the generic type, and the pointer type of the class members is naturally different from the generic type. It is necessary for us to explore the use of the following class member pointers.BodyA class member pointer is a pointer that can point to a non-static member of a class . Its type includes the class type and the member type to which it is pointing. In general, p

C + + Supplements-Multithreading: Atomic operations Resolve thread conflictsPrefaceManipulating global variables in multi-threading generally causes thread conflicts, and in order to resolve thread conflicts, atomic operations are introduced.Body1. Thread Conflicts#include RunTheoretically, the final result of G_count should be 100, but the fact is not, not only the result is not necessarily 100, and each time the results are likely to be different. T

C + + supplements--ReferencePrefaceA reference is an alias. An alias is another name for an existing object. Its own meaning is not difficult to understand, but with other concepts of a combination, it becomes the use of difficulties. Coupled with the new standard proposed a new reference-rvalue reference, reference to this concept becomes more difficult to understand and use.BodyWith the new standard, which is often the new technology, the concept of

C + + supplements--template meta-programmingPrefaceThe template element is used for recursive acceleration, which changes the run-time function call to the compile time for code expansion, similar to an inline function. Here is an example: the Fibonacci sequence nth solution.template meta-programming#include RunSummary:Recursive method takes a long time. The runtime of the template element method is problematic, and you can see the results when you mo

C + + supplements--new Delete overloadPrefaceNew and delete are a pair of operations that manipulate dynamic memory. Overloading them allows for efficient customization of memory management.Body1. Partial overloadingFor a particular type, the new and delete overloads can be monitored for dynamic creation of that type of object. The following code:Codea#include RunThe running results show thatThe expression new incorporates memory allocations and const

What is a vitamin supplement?A vitamin supplement is a tablet or capsule that is naturally extracted or synthesized to ensure the daily intake of adequate vitamins in special groups. Special groups include: People with irregular diet and a single type of food that causes insufficient vitamin intake, and people with vitamin deficiency diagnosed.Classification of vitamin supplementsNatural Vitamin supplements: health care products made from natural food

C + + supplements--LAMBDA expression principlePrefaceLambda expressions are presented in the new C++11 standard. In lambda expressions, we focus on the use of it. Now let's talk about how it's implemented.Body1. Function ObjectsThe object of the class is combined with parentheses to show the general behavior of the function, which can be called a function object.#include RunThis example shows that the essence of a function object is to overload the fu