C++

One, visitor (Visitor) mode The purpose of the visitor pattern is to encapsulate actions that are applied to some data structure element. Once these operations need to be modified, the data structure that accepts the operation can remain unchanged.

Compiling an MFC executable file or a rule DLL using/clr 1, open the Project Properties dialog box by right-clicking the project in Solution Explorer and choosing Properties. 2, expand the node next to Configuration properties and select General.

4.5 Replace stack and queue with the appropriate generic version Problem You want to increase the efficiency of your application by replacing all stack and queue objects with the appropriate generic versions, and make your code easier to use. This

. NET encapsulates the process management very well, by using the System.Diagnostics.Process.GetProcesses () method to get an array of processes within the system. Enumeration allows you to get all the processes within your system (see more than the

Recently, when you write a gadget, you need to get the domain name through the URL, do not know how the URI only get the method of host name and did not get the domain name method, so only to realize one, but I feel this method is more abnormal, I

This is mainly for programmers who have studied C # 2.0, if they already know what an anonymous method is. If it is not clear, please read "Serial: C # 2.0 Primer" (This will be translated in the future). OK, let's get to the point. A lambda

A prime number is divisible only by 1 or itself, and cannot be the product of two other integers. 1, 2, 3 itself is prime, to determine whether a number is prime, just use this value divided by 2 to its root number, if there is a number divisible,

(1) Null A null keyword is a literal value that represents a null reference that does not reference any object. NULL is the default value for reference to a type variable. Then only the reference variable can be null, and if int i=null, it is not

When a longer integer is converted to a shorter integer or char type, the excess high portion is discarded. Program One: #include int main () { int i; char c; i=65535; c=48; I=c; c=i;

#region send an XML file to the specified URL//////to send an XML file to the specified URL////// Mesh Superscript url/// Data to be sent (XmlDocument format) /// Server response public static XmlDocument postxmltransaction (String v_strurl,

Use the SAR-C command to display system call statistics. $ sar-c 00:00:00 scall/s sread/s swrit/s fork/s exec/s rchar/s wchar/s 01:00:00 38 2 2 0.00 0.00 149 120 Example Check system call statistics (SAR-C) The following example displays the

1. Although C + + is mainly a new language developed on the basis of C, she is not a substitute for C, it is not an upgrade of C, C + + and C are brotherly relations. No one is more advanced than the saying that the more important point is C and C +

A reference (reference) is an alias to an existing object. After the reference is initialized with an object, the name of the object or the name of the reference can be used to point to the object (refer to): int a = 12; int &ra = a; --ra; // a == 1

We inevitably have to deal with threads when writing remoting programs or other applications. NET makes it easy to create a thread, but it provides a way to create threads and start threads without apparently providing parameters, what if we use

Brief introduction This article describes an easy way to display CPU state information, and demonstrates how to display the percentage of processor time consumed by the CPU by configuring a performance counter and periodically polling the

Body 1.IntPtr converted into byte[] public byte[] ConvertToBytes(IntPtr dataBuf, int length) { byte[] byteBuf = new byte[length]; Marshal.Copy(dataBuf, byteBuf, 0, length); return byteBuf; } 2. Read and write INI file Generally used to read and

As software designers and developers have experienced the use of DLL (dynamic Connection library), the production of DLLs makes our applications in maintainability, code reuse and so on have greatly improved. Previously used DLLs are commonly used

1. Introduction Exceptions are a way of running time error handling provided by the language. When it comes to error handling, you probably already have a lot of experience, even if you don't mention the exception, but in order to see the benefits

In the current project, the length of the string is computed and the fixed-length character is truncated, in which the Chinese character is calculated in 2 characters, the number and the letter are calculated in 1 characters, and no ready-made

Use attributes to avoid exposing data members directly to the outside world Learning Research. NET in the early days, often encountered some learning c#/. NET's friend asks, attribute this kind of flashy thing to do what? Later when doing the