how to create function

FunctionA function is to encapsulate a piece of code in a struct, and invoke the struct (function) directly when it is necessary to execute the code. This operation enables the reuse of code. In MySQL, there are two kinds of functions: system

The execution sequence of the MFC program. 1. Create the Application object theApp The program first produces one (and only one) Application object theApp, that is, a CWinApp object. Once this global object is generated, it executes its constructor,

MySQL 7-2-storage functions and trigger bitsCN.com creation functions: 1. storage functions are also a procedural object, similar to stored procedures. They are code snippets composed of SQL and procedural statements and can be called from

Iv. create function statementIn Derby, the create function statement is used to create a function. Of course, the function is actually implemented by calling a function in the Java class. By default, the function creator and the database creator

Essentially, there is no difference. Only functions are as follows: only one variable can be returned. The stored procedure can return multiple objects. Functions can be embedded in SQL and called in select, but stored procedures cannot. The essence

I have to say that at this point, PostgreSQL is very powerful and no less powerful than any large commercial database. It is not that complicated to add custom functions. The following example adds the following functions: Test (), concat_text

Overview The voip function of Android is available in the directory frameworks/base/voip. It includes a package that supports rtp. RTP support The RTP support package is located in the directory frameworks/base/voip/java/android/net/rtp. It mainly

I often download programs from the Internet, but I can't see a few lines of VC. I move the mouse to the top right corner, aiming at the "X", click it... (The heart is still thinking: killing you !), Let alone look for the existence of QQ in the

Read the cocos2d-x DEMO code, we will see some header files using the create_func macro, so what is it doing? What is the role of cocos2d-x? Let's take a look at the source code of the create_func macro: [CPP]ViewPlaincopy /** * Define a create

read a lot of explanations on the Internet version, feel this write the best. differences between functions and stored procedures in a database There is no difference in nature. Just a function like this: You can only return a variable's limit.

The difference between a function and a stored procedure is that the function must have a return value, while the stored procedure does not. A function has much more parameter types than stored procedure parameters.function operations include

Prototype originated from French. The software standards are translated as "prototype", which represents the initial form of things and also contains the meaning of models and templates. The prototype concept in JavaScript exactly reflects the

Analysis of performance problems caused by connection with table-valued functions Table value functions SQL Server provides functions similar to other programming languages, and functions are typically encapsulated by code and return values. In SQL

If MYSQL5.5 does not have the permission to access the LIB directory, you can create a new one. In this post, you can export the DLL normally,   However, an error occurred while executing mongoshell. Here we have two methods to consider: 1. Use the

Source: http://blog.csdn.net/yuvmen/article/details/5877271Understanding the MFC program start-up process, for beginners, learning MFC is very helpful; for people who do not use VC, it will be forgotten for some time. Still come to write down,

Preface: Although there is Chenhao "JavaScript Object-oriented programming" bead Jade in the front, but I can not help but also the superfluous to fill an article, mainly because of the language charm of JavaScript. In addition this article is an

In many cases, we will use a sequential number with a specified length. If we generate an order encoding rule, we will set it to Warehouse encoding + year, month, and day (6 digits) + four sequential numbers for the current day, for example, the

1. the way to create an object instance is compared to the way to get an object instance in the cocos2d-x and the General C ++ programming method is somewhat different, the following is a piece of code, it compares the different compiling methods of

Reprinted please indicate the source: http://blog.csdn.net/mxway/article/details/40225725 This article is based on the analysis of source code 2.06 In the Flying Pigeon family. The messages of the Flying Pigeon mail can be roughly divided into three

  Cipaddressctrl control usage: (1) 1. Use the create function to manually create an IP control.At the beginning, I wrote this in the oninitdialog () function:Cipaddressctrl IPaddress;Uint nid = 101;IPaddress. Create (ws_child | ws_visible, crect (20