C++

Debug macros for Linux C programmingIn the process of completing the project, it is unavoidable to debug, here I give you a I am using a debug macro. Nonsense not much to say, directly on the code.Implementation code/*********************************

I. Preliminary knowledge-memory allocation of the programThe memory used by a program compiled by C + + is divided into the following sections1. Stack (stack)-Automatically allocated by the compiler to release, store the function parameter value,

Information such as "Memory access violation" or "segmentation violation" usually means that a pointer variable contains a pseudo-address. One common reason is that initializing a variable fails.The result of free (p) is that the address to which P

Reprint Please specify the source http://blog.csdn.net/xingjiarong/article/details/47656339By using the keyword extern, you can refer to a variable or function defined in another file in one file, with a specific example, as described below.One,

Recently encountered an enumeration type, just by the way.The base class of Enum Enum, which can be any integral type except Char. If you do not make a display declaration, the default is reshape (Int32).declares an enum type : ///

Today began to compile the game server, to find the predecessors borrowed batch files, version control on the Code, library and a series of resources, such as, the compilation error:Public.lib (Public.dll): Fatal error Lnk1112:module machine type '

because of his thesis research needs to use the LLC, but the author Jinjun Wang seems to have only given the realization of MATLAB, his own attempt to use C + +, OpenCV in the Mat class, but the speed is very slow, each 1000* 2000 or so the image

SummaryKnowledge points include: two assignments of global variables, 1 of the number after conversion to binary, and a non-cyclic expression to determine whether a number is a 2 N-squared, a logical operation and a bitwise-logical operation; the

float, double : With IEEE standard floating-point number format, fixed float 32bit, double 64bitint is generally related to CPU register length, but also related to compiler, assemblerBecause C, the C + + standard does not specify a fixed length for

The const in C language means " immutable variable ", or it can be "pseudo-constant"Const in C + +, called " a constant of type description "const int liv_num = 10;liv_num = 18;//error because liv_num is const decorated cannot be directly

Article 6: Use explicit type initialization semantics when auto deduces unexpected types Clause 5 explains the technical advantages of using Auto to declare a variable more than using precise type declarations, but sometimes when you want to zag,

In C + +, the object of a class is built into two types, one is static , such as a A, and the other is dynamic , such as A * ptr=new A;Difference: Statically establishes a class object that is allocated by the compiler to the object in the

Learned 2.5 months of advanced programming of C # This book, see the third part, to tell the truth, I am a little counseling, I think, temporarily first put, blog pause, because my level really will not, in writing down is also self-deception, I

The keywords used to define the interface in 1.c# are: interface2.c# is a purely object-oriented language. The object-oriented language has the following characteristics: inheritance, encapsulation, polymorphism.3. Difference between a value type

Recommendation 7: Use the 0 value as the default value for the enumerationThe enumeration types allowed are byte, sbyte, short, ushort, int, uint, long, and ulong. You should always use a value of 0 as the default value for the enumeration type.

The extension method enables you to add a method to an existing type without creating a new derived type, recompiling, or otherwise modifying the original type. "This is what MSDN says, which is that you can add one or more methods based on these

Coding, decoding technology is often used in the development of our programs, for some sensitive information storage, such as passwords, we generally do not directly in the plaintext directly stored in the database, but through a variety of

C # get current system time2010-01-02 16:24 --datetime Digital TypeSystem.DateTime currenttime=new System.DateTime ();Take the current month and day time of the second currenttime=system.datetime.now;take the current year int year

Category categoryA, class purpose definitions and class definitions are similar. The implementation method in the. h file is declared in the. m file.b, define the class purpose file naming rules: Class name + class name, such as "NSString + Revert".@

__ATTRIBUTE__ ((packed)) detailed1. The role of __attribute__ ((packed)) is to tell the compiler to cancel the optimization alignment of the structure during compilation, aligned according to the actual number of bytes consumed, and is a unique