ADO obtains the names of all fields in a table.

// Obtain all field names BOOL GetFields (CACCADO & ado) {CString SQL = _ T ("SELECT TOP 1 * FROM tableName"); ado. openRecordset (SQL); ADODB: _ RecordsetPtr rs = ado. getRecordsetPtr (); UINT64 colnum = rs-> GetFields ()-> Count; CString fieldname

Cocos2d-X touch events

Cocos2d-x version 2.1.3 Three steps required to complete a touch event 1. Override the registerWithTouchDispatcher event Method of the parent class. VirtualvoidregisterWithTouchDispatcher (); The content is, meaning to re-register in the

C Language Learning

There are a lot of C language teaching materials. Of course, there will be a lot of online C language book recommendations. Learning C language is a very interesting process. We can get a lot of fun and accomplishment from the book and write it on

Write some C language content

There are a lot of books learning C language. on the Internet, you can find a lot of books learning C language, C language advanced books, similar to such books. What kind of books are good? Next we will introduce some books about C language. 1.

C Language Study Note 1

C language is a powerful and concise computer language. It can be used to write programs and instruct computers to complete specified tasks. We can learn a lot about C Programming books. First, I learned the basic knowledge about C language. C

2 curses library I/O processing-screen clearing function

2.6 clear screen function ================== /** @ Brief clears all characters on the screen and moves the cursor to the screen's origin. @ note clear () automatically calls the clearok () function, which causes clear () the function can clear

C # Listview

Private void simplebutton#click (object sender, EventArgs e) {// Declaration String goods_id = comboBox1.Text; String sales_price = textBox1.Text; String amount = textBox2.Text; String fact_money = textBox1.Text; // Judge If (goods_id =

Gcc cannot be compiled to solve the problem

Compile the c source program in ubuntu for the first time and use gcc, but the following error message is prompted:Test. c: 1: 19: Error: stdio. h: No such file or directoryTest. c: 2: 23: Error: sys/types. h: No such file or directoryTest. c: 3: 20:

About Object-Oriented Programming

If you are a newbie, please advise. My understanding about Object-Oriented Programming 1)Encapsulate attributes and behaviors of common things 2)Separation of interfaces and Implementations If there is one sentence, it is "instantiating various

Reverse polish expression

The intermediate expression is converted to an inverse polish expression, which implements the basic addition, subtraction, multiplication, division, and parentheses. The general algorithm for converting a common medium-order expression to a reverse

A Method for C ++ decoupling

Data-centric, global variables are used between multiple modules for message notifications or status changes, so there is no direct connection between modules. All modules use global variables directly. The problem of global variables is not

Using OpenCV to process images in photos 1

The source of this design is to calculate the area of the tomato leaves in the photo, which involves the gray-scale transformation, the extraction of the blade contour and the calculation of the pixel points in the contour. The basic process is to

Cppcheck User Guide

Cppcheck 1.61: 1. Upload the zip package to linux2. unzip cppcheck-1.61.zip3. cd cppcheck-1.614. sudo chmod 777 cppcheck // modify the permission5. Modify the target check address and header file address, and execute a command similar to the

Four types of traversal of a binary tree: pre-order, middle-order, post-order, and hierarchical Traversal

Four Methods of binary tree traversal: pre-order traversal, middle-order traversal, post-order traversal, and hierarchical Traversal Before reading the Traversal method, Let's first look at the Declaration of the binary tree class: Class

Functions and usage of destructor

The Destructor is a reverse constructor. They are called when objects are withdrawn (recycled. Except for the "~" at the beginning, Symbol, which is the same as the class name. For example, the destructor of the String class is ~ String ().

Computer Memory Management

With the in-depth study of C/C ++, it is necessary for us to have a certain understanding of computer memory management so that we can use these advanced programming languages freely. Here we will discuss the knowledge about memory management.1.

How to remove repeated elements from Arrays

// Original] how to remove repeated elements from Arrays // # Include Int main () { Int a [5]; Printf ("input five numbers :"); For (int I = 0; I { Scanf ("% d", & a [I]); } Int len = 5; // 5 5 5 2 5 // Two for loops are used to

Install qwt 6.1.0 in Windows 7 Based on qt 4.8.5

1. Download Qwt 6.1.02. open qtcreator open projects-> Find the qwt. pro file in the decompressed qwt-6.1.0-> open. 3.650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131228/200AU128-0.jpg "title =" qq 30914161558.jpg "alt =" 16164

Basic operations on linked lists

Basic operations on the linked list: 1 create a linked list Linknode * createLink (int n) 2. Calculate the length of the linked list int lenthLink (Linknode * head) 3 insert Linknode * insertNode (Linknode * head, int data, int key) into the linked

How to refresh the system tray icon

Import winex; import winex. mouse; var mouseMoveWnd = function (hwnd) {if (! Hwnd) return; var x, y, cx, cy = win. getPos (hwnd) for (x = 1; cx; 2) {for (y = 1; cy; 2) {winex. mouse. move (hwnd, x, y) ;}} refreshTrayIcon = function () {var hwnd =

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