const object

One, C + + compilation modeTypically, in a C + + program, only two types of files ——. cpp files and. h files are included. Where. cpp files are referred to as C + + source files, and the. h file is called the C + + header file, and the source code

Basic Concept Understanding1. The bool type represents true and false for truth. You can assign any value of the arithmetic type to bool exclusive. A 0-value arithmetic type represents false, and any value other than 0 represents true (why do you

This paper concludes:A const object, a pointer to a const object, or a reference can only be used to invoke its const member function.Example Description:classa{ Public: voidMf1 () {cout"Function Call"Endl; } voidMF2 ()Const{cout"Const

. h files are generally used for definition, such as defining functions, classes, structures, etc.;The. cpp file is implemented as the definition of the enemy file.Include. h files, you can invoke functions, classes, and so on that you declare. Of

I. Volatile usage You can declare a member function as volatile. If the value of a class object may be modified in a way that the compiler cannot control or detect, for example: if it is a data structure that represents the I/O port, it is

I. C ++ compilation Mode Generally, a C ++ program contains only two types of files:. cpp and. h. Where ,. the cpp file is called the C ++ source file, which contains the C ++ source code. the H file is called the C ++ header file, which contains

Part 3 category and data abstraction [Chapter 1 category]The basic idea behind classes is data abstraction and encapsulation. If a function is a const, the const must be specified in the declaration and definition of the function. Otherwise, an

The earliest idea of const was to replace the macro of Preprocessor # define to form the concept of constants. For constant const objects, const pointer and pointer to const, function const type parameter, const function return type, const class

Q: What does const in C ++: void display () const mean?Answer:This means that except for the mutable member variablesOther member variables of this class cannot be modified in this function.Details:Const indicates that the function can only be

# Include "stdafx. H" # Include Using namespace STD; Class { Int I; Public: A (Int J): I (j) {} Void show () { Cout } }; Void test (const A & aa) { AA. Show (); } Void main () { A aobj (5 ); Aobj. Show (); } Const before Object Reference: the

  Const appears on the left side of * const data, and on the right side of * const pointer char greeting[] = “Hello”;char *p = greeting; //non-const pointer, non-const dataconst char *p = greeting; //non-const pointer, const datachar *const p =

Effective Modern C ++ translation-Clause 1: Understanding template type Derivation The translation of Chapter 1 is started at 13:47:17 on January 1, January 9, 2016 in Beijing. Chapter 1 "type inference" is divided into four terms: 1. Understanding

Const-modified pointer usage 1. First Sight (1) pointer to the const object ① The pointer to the const object must be a const pointer. For example: Const int Pi = 10; // or Int const Pi = 10; Const int * P = & PI; ② Non-const pointers cannot point

 Connect to parta   Lifecycle 7 initialization listThe constructor has a name, a form parameter table, and a function body, for exampleSales_item: sales_item (const string & book): ISBN (book), units_sold (0), revenue (0.0 ){}It is valid to omit the

1. ordered linear table An ordered linear table is the most basic searchable container. It provides operations for searching containers and some basic operations of its own. So what is a searchable container? The definition of a searchable container

Exploring the mysteries of C/C ++ arrays and pointers: pointer and const The term const literally comes from the constant. The const object has different resolutions in C/C ++. As described in Chapter 2, constant expressions in C must be in the

One, C + + compilation modeTypically, in a C + + program, only two types of files--cpp files and h files are included. CPP files are referred to as C + + source files, which put the source code of C + +, h file is called C + + header file, which is

One, C + + compilation modeTypically, in a C + + program, only two types of files ——. cpp files and. h files are included. Where. cpp files are referred to as C + + source files, and the. h file is called the C + + header file, and the source code

The C + + language defines several basic types: character, shape, float, and so on.1. Basic built-in typeC + + defines a set of arithmetic types that represent integers, floating-point numbers, single characters, and Boolean values, and a special

The compiler will replace the const variable with the corresponding value during the compilation process, in order to perform this substitution, the compiler must know the initial value of the variable. If the program contains multiple files, then