pointers and references

Static_castThe use of static transformation Unlike dynamic_cast, static_cast can be used not only for pointers and references, but also for other types Generally used for non-type ordinary data Object transformation The problem of

In the world of C + + There are two concepts, the upward type conversion, the downward type conversion, respectively describing the subclass to the base class, and the base class to the subclass of the coercion type conversion.Force type conversions

http://blog.csdn.net/jiajia4336/article/details/8996254Forward declaration Concept (forward declaration)The class type B is introduced in the program. After the declaration, the class B is an incomplete type (incompete type), that is, B is known as

Combination and Inheritance one of the most important features of C + + is the reuse of code, in addition to the copy, C + + should have more in-depth functionality 1. Combination and inheritance   combination is a simple creation of a new class

1. Why do I add extern "C" when I call a function compiled by the C compiler in a C + + program?A: First, extern is a keyword that indicates the scope of functions and global variables in the C + + language, which tells the compiler that its

//1.vector: Variable size array. Fast random access is supported, and inserting or deleting elements at a location outside the trailer can be slow. //deque: Double-ended queue. Supports fast random access, inserting or deleting elements quickly at

[C ++ self-explanation] basic Series 1 pointer and reference 0 Preface Pointer, reference, pointer and reference are different.1 pointer Variable:In the code, you often apply for and name a bucket by defining variables, and use the bucket by the

VariableBuilt-in types In C + +, the definition of a type is basically the same as the C language, except for some differences. In C + +, the return type of the main () function must be of type int, as described in C + + primer. This has not

The second chapter of C++primer e5.1. Default initialization, value initializationValue initialization: A pair of empty parentheses followed by a type name.String *ps1 = new string; Default initialized to empty stringString *ps2 = new string ();

The C ++ programming language is very powerful. It not only supports the functions used in the C language, but also has the special functions of the C ++ language. Here we will introduce in detail the differences between references and pointers in C

C ++ Pointer and Reference vomit blood arrangement pointer & Reference, vomit blood Pointer Many people have a headache and confuse when talking about the pointer of C ++. It is often confused with variable names, references, etc. In fact, the main

I. pointer: The content is a variable indicating a memory address. The type indicates how the compiler interprets the pointer content pointing to the content in the address and the size of the memory area. Example: [cpp] int I = 0; int * pi = & I;

I. Role of const: 1. Modify the value specified by const Ex1.1: Const int a = 2; // A = 3; error: assignment of read-only variable Just like a macro in C language, a will be put into the symbol list, but a is an internal link (internal link refers

The difference between the four cast operators of C + +Not my original-------------------------------------------from:http://blog.csdn.net/hrbeuwhw/article/details/7884797--- ------------------------Q: What is C-style conversion? What are

12-inheritance and polymorphism (lower)I. Rewrite and reload Class Parent {public: virtual void func () {cout Function overload: (1) it must be in the same category, that is, in the same scope. (2) The subclass cannot reload the

Is-a, Has-a, and like-a, grouping, aggregation, and inheritance the difference between the two sets of concepts-cbk861110 column-Blog channel-Csdn.net http://blog.csdn.net/cbk861110/article/details/9028189Public succession emphasizes the

There are three major differences between reference and pointer:1. The reference must be initialized and the pointer is not required.2. The reference cannot be changed after initialization. the pointer can change the variable.3. There is no

Return creates a temporary variable before execution to save the value to be returned,Returned value: returns a copy value, which has been eliminated.Return pointer: When returned, the original pointer space will be eliminated. if not used by other

Reading Notes Objective C ++ Item 40 wise and careful use of multiple inheritance, too tiveitem1. Two camps inherited from each other When we talk about multi-inheritance (MI), the C ++ committee is divided into two basic camps. One camp believes

Record important c ++ learning records 1 const understanding:1. const modifies Common variables and pointersThe const modifier variable can be written in two ways:Const TYPE value;TYPE const value; These two methods are essentially the same. It