C # resolves an issue with importing a database from an Excel table with an identity card number

When you import an SQL database from an Excel table in C #, you find that the ID number imported from Excel becomes a scientific representation.It is easier to solve this problem, first, open the spreadsheet, select the "ID number" column,

Header and source files in C + +

Original address: http://www.cnblogs.com/lidabo/archive/2012/04/17/2454568.htmlOne, C + + compilation modeTypically, in a C + + program, only two types of files ——. cpp files and. h files are included. Where. cpp files are referred to as C + +

C + + implementation of Gaussian fuzzy algorithm

2008 in a PS discussion group, there are netizens puzzled Photoshop's Gaussian blur in the radius of what meaning, so I wrote this article:A summary of the algorithm for the Photoshop Gaussian blur filter;In that article, we mainly explain the

"Data Structure" in C + + implementation of a single cycle linked list of various operations (including header delete, tail delete, insert, reverse, destroy, empty, etc.)

Header file #ifndef _list_h#define _list_h#includeusing namespace Std;templateclass CList ; Templateclass Listnode{friend class clist;p ublic:listnode ():d ATA (Type ()), Next (NULL) {}listnode (Type D, listnode *n = NULL):d ata (d), Next (n)

LR Scripting user-defined C-language functions

LR Script Combat: User-defined C-language function LoadRunner can use standard C language functions, so we can write our own function in the script to call, the script structure, better reuse. First look at an example: Action () {int i,j; j = 1;

C + + Brush title--1938: Capitalize the first letter

DescriptionEnter an English sentence and change the first letter of each word to uppercase.InputThe input data contains multiple test instances, each of which is a line of English sentences with a length of not more than 100.OutputPlease output the

A review of C + + knowledge (I.)

Feel the world is agreed, the first program of each language is always Hello world! but also some books seem to be in pursuit of individuality, will use some other, but is not Hello world! I need to learn C + +, so from the most basic start. All

"C language" talking about strtok () and null

One, strtok () functionThe Strtok () function is included in the header file String.hSyntax: Char *strtok (char *str1, const char *STR2);Function: The function returns a pointer to the part of the string str1 that is immediately marked, and the

C # Multithreading practices-Lock and thread safety

Locks implement mutually exclusive access to ensure that only one thread can enter a particular code fragment at the same time, considering the following class:Class Threadunsafe { static int val1, val2; static void Go () { if (val2! = 0

Code writing specification for C + + source code

Code writing for C + + source code 1. At the beginning of. cpp there should be a uniform description of the format, including the following:A. File name (filename);B. Brief description of the document function, purpose (Comment);C. Founder (creater);

A summary of the sizeof C language

First, the concept of sizeofSizeof is A single-eye operator of C, such as other C - language operators + +, and so on. It is not a function. the Sizeof operator gives the storage size of its operands in bytes. The operand can be an expression or a

Read data from C #: DataReader object

the previous ExecuteReader () method, which involves the command object, returns a DataReader object, so we'll describe the Datareade object in detail. The following example uses the same data table as in the previous article for the Manager data

C # Get the current day of the week three ways to implement

Get the current day of the week to achieve this feature there are several ways, next will be listed 3 for your reference, interested you can not miss Ha, I hope the knowledge provided in this article is helpful to youThe first type:string[] Day =New

C # Implementation of carriage return function key function keys

This article describes the C # keyboard input enter key to achieve the Click button Effect of the method, in C # project development is very practical value. Share to everyone for your reference.The implementation method is as follows:Set the

Read the Classics-"CLR via C #" (Jeffrey Richter) Notes _ ILDasm.exe See how the compiler compiles types and their members Narimoto data

"Instance Code"usingSystem; Public Sealed classSomeType//-------------1{ //Nested Classes Private classsomenestedtype{}//-------------2//constants, read-only fields, and static readable/readable segments Private ConstInt32 someconstant =1;//

Do not use the IDE to write C # 's Hello World

Writing C # 's Hello World with the IDE, such as Visual Studio, is easy, but out of the IDE can you print Hello world? This is not to say that you are working out of the IDE, but instead learn about the CLR's execution model.Hello World

C # Output 24-hour format time

When I was testing a program, I found that it was supposed to be 24, and it turned out to be 12 hours, so the order was incorrect when the list was loaded.Then it should be time. The format problem of ToString (xx) xx.So you need this:such as

The C ++ complex class is overloaded with Division operators and operators.

The C ++ complex class is overloaded with Division operators and operators.C8-1 plural addition, subtraction, multiplication, division (100.0/100.0 points)Description Calculate the addition, subtraction, multiplication, and division of two plural

When the object layout is known, the address is adjusted when the C ++ Object Pointer is converted, and the layout pointer

When the object layout is known, the address is adjusted when the C ++ Object Pointer is converted, and the layout pointer I noticed this problem when debugging and researching the netscape browser plug-in development. That is, when the object

Huawei machine question 2, Huawei machine question

Huawei machine question 2, Huawei machine questionQuestion 2: Question description (40 points): enter a string of lower-case letters (~ Z. Compile a character string compression program to compress duplicate letters that are present continuously in

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