honeypot definition

Http://blog.163.com/wshyao@126/blog/static/1070451420081018103237836/ # Connector and # Connector # The Concatenation symbol is composed of two pound signs. Its function is to connect two substrings (tokens) in the macro definition with parameters to form a new substring. But it cannot be the first or last substring. The so-called token refers to the minimum syntax unit that the compiler can recognize. The specific

Objective:In the work, many small partners will be in the PCH file definition some common macros, but also afraid to write these simple macro waste of time, and sometimes forget how to define what to do? I am also in the work of the same. So here to share some common macro definitions, like the small partners can be used directly in the project (continuous update)!For the convenience of everyone, please click on GitHub-Macro

0. PrefaceFrom the beginning of learning C language began to contact Makefile, consulted a lot of makefile information but the total feeling did not really master makefile. Assuming that you write a makefile, you always think it's very exhausting.So deliberately using the blog to summarize the relevant knowledge of makefile. The detailed use of the makefile is illustrated by the sample example.Examples say that makefile is divided into the following sections. For a lot of other content please re

Error message: Error C2065: ' Salary ': undeclared identifier#include Problem root: Compiler issues--c89 and C99C89 specifies that all local variables are declared at the beginning of the block before any execution of the statement.There is no restriction in C99 and C + + that variables can be declared anywhere in the block before first use.The variable declaration is placed in front of the error.#include Pros and cons of different stylesvariables are defined at the beginning of the function: ea

When using the GCC compiler, the program was able to compile, but the result was problematic, I looked up a lot of places, or I didn't know where the problem was. It was later discovered that a variable was not initialized. I felt that when using VS, I rarely delay time on this issue, so I think of the-wall parameters that are rarely used, and I compile it with the correct compiler and use the correct program, but a bunch of warnings and errors come out of the-wall. As follows: test2:in function

The relationship between the structure definition of data dataset and the instance Www.yescnet.com CNET Chinese web In. NET database development, it is unavoidable to use Datasets (datasets), when reading the MSDN Learning DataSet, because there is no clear distinction between the definition and the instance of the dataset, in the operation, there is always a dataset, where a dataset, around, but do not kn

Teaching Purpose: grasping the concept and type definition of linear table Teaching emphases: the type definition of linear table Teaching Difficulty: The type definition of linear table Teaching Content: Review: Types of data structures The characteristics of linear structure: In a non-empty finite set of data elements, (1) The existence of a uniq

6.3 first recognized class Class introduces some new syntax: three new object types and some new semantics.6.3.1 class definition syntax The simplest form of class definition is as follows: Class ClassName: . . . The class definition is the same as the function definition (def statement). It must be executed befo

1. Reference: refer to a resource ID. 1) attribute definition: 2) attribute usage: Android: layout_width = "42dip" Android: layout_height = "42dip" Android: Background = "@ drawable/image ID"/> 2. Color: color value. (1) attribute definition: (2) attribute usage: Android: layout_width = "42dip" Android: layout_height = "42dip" Android: textcolor = "#00ff00"/> 3. boolean: Boolean value. (1) a

/Home/TACE/openav/source/seamlessmessage/cpaoflt. O: In function 'cpaoflt: get_m_strprmair () const ':Cpaoflt. cpp :(. Text + 0x0): Multiple definition of 'cpaoflt: get_m_strprmair () const'/Home/TACE/openav/source/seamlessmessage/cpaoflt. O: cpaoflt. cpp :(. Text + 0x0): first defined here During the compilation process, GCC reports the multiple definition of function errors, mainly including the followin

There are two types of macro definitions: macro definitions without parameters and macro definitions with parameters. Macro definition without ParametersThe general format of macro definition without parameters is: # Define macro name string# Define PI 3.1415926Main (){Float area, R;Printf ("Area = % F", pI * r * R );}In the above program, the macro pi is used to replace the string 3.1415926. The advantage

Ask questions:If you have such a template:class test{public: static std::string info;};What is right (by compiling) for several of the following definitions?Template stringtestint>::info ("123"); templatestringTest"123"); templatestringTest:: Info;templatestringtestint>:: info; templatestringtestint>:: info (); templatestringTestIn order not to affect the analysis and judgment, I put the answer color into a relatively light color, the following is the answer: Template Template

We are in the program design, always use the definition of variables and variable declarations, but sometimes we are not very clear about the concept, know how it is used, but do not know how to do, the following I simply put their differences are described as follows: There are two things about the declaration of a variable:(1) One is the need to establish storage space (definition, declaration). For exam

#defineThe command #define defines an identifier and a string. Each time the identifier is encountered in the source program, it is substituted with a defined string. The ANSI standard defines an identifier as a macro name and replaces the process with a macro substitution. The general form of the command is: #define Identifier string Attention:1. The statement does not have a semicolon. There can be any space between the identifier and the string, which, once started, ends only wi

Definition of structureThe general form of defining a structure is:struct structure name{Member table columns}A member table consists of several members, each of which is an integral part of the structure.A type description must also be made for each member.For example: Copy Code code as follows: struct STU { int num; Char name[20]; int age; } description of struct type variableA struct

This article details the JavaScript of various common function definition methods, share for everyone to reference. The specific analysis is as follows: First take a look at four of the most common function definitions of javascript: Functions defined with function constructors, the code is as follows: var multiply = new Function (' x ', ' y ', ' return x * y; '); function declaration, this is also the most common one: function

Like a function template, using a class template enables a user to define a pattern for a class, allowing some data members in the class, arguments to some member functions, and return values of some member functions to take any type. A class template is an abstraction of a class that is different from a group of member data types only. Programmers can greatly improve the efficiency of programming by creating a class template for the entire family of classes, giving a set of program code to gene

Recently in busy live555 project; Honestly, this is the first big project I've done. Although it was the first time I had done such a big project for such a long time, I felt that I had made no progress in this year; adding a global variable wasted my half a day of force. No more nonsense, cut to the chase. Global variables, the earliest I read the C primer Plus is supposed to be called an outsider variable. is always declared with the keyword extern in a header file, the declared variable can

(i) Symbolic constants A macro definition is a substitution policy in C that uses a preprocessing command #define equate a string of (verbose) text with a name (called a macro), and then you can use the macro in bulk in the source code. In the preprocessing phase, replace the macros in the source code with the original text. For example, in the source code: #define PI 3.14Then in the next code, you need to write 3.14 of the place can be directly r

If you haven't contacted a dynamic language, it will be a magical and weird feeling to understand JavaScript in a compiled language, because the things that are often impossible in consciousness happen, and even feel unreasonable. If you're learning JavaScript in a free and changing language, this is the way you feel. , then from the beginning, please put down your "prejudice", because this is absolutely a new continent for you. Well, not to everyone chit chat when, to get to the bottom of it, l