C++

  I don't remember who said that we should try to use const when using const. Indeed, const has made great contributions to increasing the robustness of the program, but it is worth noting that const modifies pointers. 1. pointer to the const object;

15.2.6 friendship and inheritanceLike other classes, a base class or a derived class can call other classes or functions youyuan. You can use the private and protected data of the metadata class.The relationship between friends and friends cannot be

16.4.5 member Template Any class (template or non-template) can have its own members as class templates or function templates. Such members are called member templates, and member templates cannot be virtual. 1. Define a member Template Template

I wrote a String class without copying constructor, but there is a copy assignment operator. Code: 01# Include 02# Include 03Using namespace std;04 05Class String06{07Public:08String (): data (0) {cout 09String (const char * str): data (0)10{11Int

Factory method modeDefinition: Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory method lets a class defer instantiation to subclasses.Defines an interface used to create objects so that the

The Destructor is a magical part of C ++. when calling the destructor, you do not need to write the code called by the function like a common function, instead, the compiler inserts the Destructor into a suitable place to call the program. If you do

# Include # Include # Include Using namespace std; Template Out_type convert (const in_value & t){Stringstream stream;Stream Out_type result; // The Conversion result is stored here.Stream> result; // write a value to the result.Return result;}

[Cpp] # include # Include # Include # Include # Include # Include # Include # Include Using namespace std; Class Point{Public:Point (double x, double y ){};Point (Point & p );Private:Double x, y;}; Point: Point (Point & p): x (p. x), y (p. y){Cout } 

I. Overview Definition: You can use a prototype instance to specify the object type and copy the prototype to create a new object. In other words, you do not need to reinitialize the object, but dynamically obtain the status of the object during

I. Memorandum Mode Definition: capture the internal state of an object without compromising encapsulation, and save the state outside the object. In this way, the object can be restored to the previously saved state. Structure:   Scope of use: The

1. Visitor Mode Definition: an operation that acts on each element in an object structure. It allows you to define new operations that act on these elements without changing the classes of each element. The structure is as follows:   Ii.

Overview: 1. Why do I need to use youyuan? Generally, for common functions, it is impossible to protect members of the category class. To do so, you must make all the members of the class public (shared ), however, the problem is that any external

This article mainly verifies the use of the container search algorithm: lower_bound, uper_boundVerification item:1. lower_bound and uper_bound values when key> begin2. lower_bound and uper_boudn values when key 3. When key = a value in the container

I learned the memory Alignment Technology in the C ++ struct today, so I searched for the memory Alignment Technology in the evening. I. Reasons for memory alignment most references are as follows: 1. Platform reason (reason for transplantation):

MMgc is the memorymanagementgarbagecollector used in Flash Player. MMgc is used not only to recycle objects in the ActionScript, but also to manage all dynamic memory allocation and release requests in Flash Player, in the C ++ code of Flash Player

Another point is that the recovery from the file ----> memory ---------> object is not called by the constructor. This is amazing...We successfully restored two objects but did not call the constructor... the reason why I succeeded in this

To dynamically allocate a two-dimensional array in C/C ++, You can first apply for a one-dimensional pointer array, and then apply for an array for each pointer in the array, which is equivalent to a two-dimensional array, however, this method may

1 unsigned char * CGetHexStringDlg: TQ_GetHexStringEx (unsigned int nNumber, unsigned int nCount)2 {3 unsigned char * pBuff = new unsigned char [nCount];4 memset (pBuff, '0', nCount); // all locations '0'56 static const char hex_map [] = "0123456789

First of all, standard C/C ++ does not support Regular expressions, but some function libraries provide this function. Philip Hazel's Perl-Compatible Regular Expression library, in addition, most Linux releases contain this function library. The

At first glance, this is a problem with multiple backpacks because you need to record the number of each item.Since every time you know the number of items in the transfer status, you can do it based on the full backpack. This will greatly improve