pointers and references

Conversion from a derived class to a base class Basic usage: Double print_total (const item_base &, size_t) {STD: cout The highlight is not a passing parameter, but a pointer. The base class pointer P can also point to a derived class object that

This is the fourth article in the C ++ 0x series. It mainly covers the newly added lambda expressions, function objects, and bind mechanisms in C ++ 0x. The reason for putting these three parts together is that they are closely related. Through

G ++ is a component in the GNU compilation Toolkit (GCC). It is used to compile source files written in C ++. From the C ++ source file to the executable file compilation process, there are several steps below. g ++ provides many compilation options,

There are four forced conversions in C ++: const_cast, static_cast, dynamic_cast, and reinterpret_cast, which are described as follows:   1. const_cast: FormConst_cast (expression) is used to modify the const or volatile attributes of a type.

We have four specific castingoperators:Dynamic_cast,Reinterpret_cast,Static_castAndConst_cast.Their format is to follow the new type enclosed between angle-brackets (<>) And immediately after, the expression to be converted between

VB is an unexpected SeriesEvery time I see the wonderful things of the master, I will scream: "Wow, I can't think of it! ". After many such feelings, I found that as long as we use our brains, we can make things unexpected to others. So I want to

The first impression given by const is to define constants. (1) const is used to define constants. Example: const int n = 100; const int M = 200;In this way, as long as N and m are used in the program, they represent integer 100, 200, and N and M as

1.Base class and derived class: When a class is derived from another class, the original class is called the base class, And the inherited class is called the derived class. The basic syntax is: Class subclassname: Public baseclassname {}; Public

Statement by netmd: I am not original, from the Internet, and a collection of two posts. I personally think this is more complete. ---------------------------------------------------------------------- Q: What is C style conversion? What are

The base class derived class (derived class) 1 C ++ supports several methods of polymorphism: A uses an implicit conversion, convert from "pointer or reference of a derived class" to "pointer or reference of its common base class type" B. Use the

Transferred from http://www.cnblogs.com/yedaoq/archive/2011/04/29/2032597.html1#const_cast   Description from msdn : A pointer to an object or an object member can be explicitly converted to the same type with different const, volatile, or

ArticleDirectory 1. What are the results of the following program test? 5. In C ++, there is malloc/free. Why do we still need new/delete? 1. The following Program What are the results of the test? # Include using namespace STD;

1The member can be data, function, orType alias(TypedefDefined). 2,ConstMust appear in the declaration and definition at the same time. 3The number and type of parameters of the two overloaded members cannot be the same. You can alsoConst.

The value semantics indicates that copying an object has nothing to do with the object metadata, just like copying an int. The built-in types of C ++ (bool/INT/Double/Char) are both value semantics, complex <>, pair <>, vector <>, map <> and so on

Question guidance:1. What is the data model of zookeeper?2. What are the traps of zookeeper applications?3. What is stored in each node (znode?4. What does a znode maintain a State structure?5. What is the znode composition structure?6. What is the

I. pointer 1. Delete pointer (1) After the pointer is deleted, the pointer must be null. It is invalid to use a null pointer, which may cause program crash. The pointer is null to facilitate the check of errors. (2) In Class destructor, after

1. If you use VC to develop programs, what are the common errors, C2001 and c2005.A: during the process of learning VC ++, the error message C2001 is mainly unresolved external symbol (uncertain external "symbol "). This error message is generated

One sentence I think is a famous saying for programmers: the future trend of programming is libraries, dynamic scripting languages, and virtual machines. I thought it was right when I heard this sentence, but it took a long time to understand it

  1. Why should I add the extern "C" to call the function compiled by the C compiler in the C ++ program "?A: First, extern is a keyword in the C/C ++ language that indicates the range of the function and global variable. This keyword tells the

It is important to use class object pointers and references, especially references, in terms of object-oriented programming and function parameter descriptions-especially the latter. Class objects may involve a considerable amount of data. Therefore,