C # and database Access Technology Summary (16) The DataSet object

DataSet objectA DataSet object can be used to store data that is queried from a database, because it disconnects from the database as soon as it gets or updates data, so programmers can use this to efficiently access and manipulate the database. And

C language Trap (1)---a trap for assigning a value of char to int

As a novice C (although the first language of learning is C, but the actual development of C project is the most recent thing), the use of C process encountered in various types of problems, doubts, knowledge loopholes to make up is undoubtedly very

C + + string function supplement (type cross, split, merge, slimming)

int stringutil::intfromstring (String data){ NOTE Atoi is a non-standard C function Return Atoi (Data.c_str ());}string stringutil::stringfromint (int data){ Char tmp[11]; memset (tmp,0,11); sprintf (tmp, "%10d", data); return

Summary of usage of the string class in standard C + +

Transferred from: http://www.cnblogs.com/xFreedom/archive/2011/05/16/2048037.html(Partially modified)Believe that the use of MFC programming friends to CString this kind of impression should be very deep it? Indeed, the CString class in MFC is

Advantages and disadvantages of recursion in C + + application

" recursion " in C + + (C + + training) in the main solution with the tree-like features of the algorithm or data structure, the use of recursion can make the algorithm or data structure greatly simplified, the code is simple and clear, the same

"C + + Primer (fifth edition)" Knowledge Consolidation

Operating platform: Ubuntu 12.04/GCC 4.8.0Chapter Two: Basic built-in types1.decltype Type IndicatorWhen we infer the type to be defined from the type of the expression, you can use Decltype () to parse it, and decltype, unlike auto, Decltype

"C++11" Preparation: GCC 4.9.0 compile and install

C++14 are all thick, now c++11? Yes, the learning initiative is too poor for me to review. Before looking at a few eyes, but no chance to apply to work, the company's environment is HP-UX, the current development environment is still old VS2008. So

C Language Review -1-linux C Programming Guide

1.Formatted output:  printf ("%-m.nf", a);where all of the formats are formatted as%-m.nf-: Stands for left alignment, default has right alignmentM: Represents the number of placeholders,N: Representing precision2.The form of the function definition 

C + + const

In the program often encountered the const, but he did not know very well, today saw an article is very good, so copied over ....Original link: http://blog.csdn.net/Eric_Jo/article/details/4138548The use of the Const keyword in C + + is very

C + + constructors and destructors

Constructors and destructors are two very special functions: they have no return value. This is obviously different from a function that returns a void, although the latter does not return any values, but it also allows it to do something else,

How to use scanf () to read a string with spaces in C language?

LandlordComment posted: 2011-01-14 15:39:55#include int main (void){int i;Char a[5];scanf ("%s", a);printf ("%s\n", a);return 0;}Run input Hello WorldEnterThen the output is only the part before the space, how to put the space after the part also

C-language character data (characters)

Representation of the character type data Character data is a character. Character data is one character enclosed in single quotation marks. For example: ' A ', ' b ', ' = ', ' + ', '? ' Are all valid character data types. In the C

Tips for Beginners to C # (a) Getting Started

Recently taught net knowledge in a training facility. Every day will lead students to learn C # knowledge. I want to keep a record of my daily study notes. It can be used as a reference for beginners in the garden. Also welcome the birds in the

C # Read XML file configuration file WinForm and Webform-demo

I use the Winform and WebForm Two examples to illustrate how to manipulate an XML document for read operations as a configuration file.1. Create a new class named "SystemConfig.cs" with the following code:using system;using

Introduction to malloc and free in C

1. Basic Concepts and usage of malloc () and free: 1. function prototype and description: Void * malloc (long numbytes): This function allocates numbytes bytes and returns a pointer to this memory. If the allocation fails, a null pointer is returned

C # basic knowledge (5). variable types and string processing

This article is written by Karli Watson. it mainly includes some of your lack of C # basic knowledge and online note usage, this article mainly covers C # simple variable types and complex variable types, naming rules, implicit conversion and

Chapter 4 of C ++ Primer 4 th book note-associate container and associate container

Chapter 4 of C ++ Primer 4 th book note-associate container and associate container For Original Articles, please indicate the source:Http://www.cnblogs.com/DayByDay/p/3936464.html He loves reading. He pays attention to Reading Notes and uses

High-performance TCP & amp; UDP Communication Framework HP-Socket v3.2.3 officially released, high-performance tcp

High-performance TCP & UDP Communication Framework HP-Socket v3.2.3 officially released, high-performance tcp HP-Socket is a set of common high-performance TCP/UDP Communication frameworks, including server components, client components, and Agent

C ++ hardware information to obtain the MAC address of the NIC, mac address of the NIC

C ++ hardware information to obtain the MAC address of the NIC, mac address of the NIC There are many ways to obtain the MAC address of a computer Nic.Command line formatObtain the MAC address of the wired and wireless network cards. On the code. [1

I. from Java, C # To C ++ (Why is C ++ hard)

Since C ++ is almost forgotten, I have switched to the latest C ++ Primer version and intend to learn more about the C ++ language. The fifth version of C ++ Primer has been "restructured". It integrates the C ++ 11 standards and lists them all in

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