C + + Builder exports database data to Excel summary 2

void __fastcall Tfrmdispatchdataexport::D isplayexcelreport (String _title, String _strsql){int i=0;Variant Excelapp1,workbook1,sheet1;Ansistring Filename=getcurrentdir ();Filename=filename+ "\\Template\\DispatchReport.xlt";Run

c&c++--Library header file and its role

1, some of the role of the header file:: ANSI C. Provide assertion, assert (expression): GCC. Gtk,gnome's base library provides a number of useful functions, such as data structure manipulation functions. Use glib to include only: GCC. Folder

C++_ how to get string contents within a class

You encounter a problem in your project that you want to get the string contents of the class outside of the class.The content cannot be modified by passing a string pointer directlyPossible methods:1. Passing the address of a string array2. Passing

C + + class construction, copy construction, destructor, etc.

1:An empty class is no longer empty after the C + + compiler is processed, and the compiler automatically declares some member function for us if you writeClass a{};After the compiler is processed, it is equivalent to:Class A{PublicA (); Default

A summary of common header files and functions in C + +

C + + header File ListC#include //Setting the insertion point#include //character processing#include //define error codes#include //floating-point processing#include //macros corresponding to various operators#include //define constants for the most

Eight kinds of sorting algorithms that must be known "Java Implementation" (c) Merge sort algorithm, heap sorting algorithm detailed

First, merge sort algorithmBasic idea:Merge (merge) sorting method is to combine two (or more than two) ordered tables into a new ordered table, that is, the ordered sequence is divided into several sub-sequences, each sub-sequence is ordered. Then

10 C-Language open source project codes that are most worth reading

lua

1. WebbenchWebbench is a very simple web site pressure measurement tool that is used under Linux. It uses fork () to simulate multiple clients accessing the URL we set at the same time, testing the performance of the site under pressure, and

C + + Beginner Const usage Explained

About the in C + +Const OFFThe use of the key word is very flexible, and using the const will greatly improve the robustness of the program, referring to the Kang Jiandong's const use of a detailed article, some of which have been supplemented,

Visual C + + development experience and debugging skills

Their usual collection of some skills and experience, here to share, to popularize knowledge.  1. How to debug in release stateproject->setting=>projectsetting dialog box, select the release status. The category Selection general,optimizations

Support for the "=" assignment operator in vectors in C++/stl

Thanks to the curiosity of vectors in the STL for the "=" (Assignment operator) support for custom data types, a simple test code was tested.It turns out that vectors support good for assignment budgeting, but for vector arrays of dynamically

A brief description of the difference between the keyword var and dynamic in C #

The difference between the keywords var and dynamic in C # is as follows:1. Variables declared by Var must be initialized, and dynamic declared variables do not need to be initialized.2, the VAR keyword can only declare local variables within the

Properties in C # (GET, set, value)

The C # language has strict requirements for data security in object-oriented design and programming, and one of the important principles is data encapsulation. According to this principle, C # programming requires developers to make the data fields

Write a C # console application completely without using VS

(because this must be a console application) csc.exe is the C # compiler step in the Microsoft. NET Framework as follows: 1) write a console application code in Notepad, save it in the E-drive, Test.csUsing System;namespace test{class program{static

C # object Lock--monitor

There are some static methods inside the monitor that can be used to get the synchronization lock on the object for some process synchronization control operationsThe usage and attention points are as

157 recommendations for writing high-quality code to improve C # programs--Recommendation 101: Using extension methods to "add" methods to existing types

Recommendation 101: Use extension methods to "add" methods to existing typesConsider how to have a new behavior for a sealed type. We used to create a wrapper class and then add a method to it, which doesn't look elegant at all. We might consider

157 recommendations for writing high-quality code to improve C # programs--recommendation 45: Specifying contravariance for generic type parameters

Recommendation 45: Specifying contravariance for generic type parametersContravariance refers to a method's parameters can be a base class for a delegate or a generic interface's parameter type. Common delegates that support contravariance in FCL4.0

"Turn" SPI & I²c

From the following address: http://www.byteparadigm.com/applications/introduction-to-i2c-and-spi-protocols/I²c vs SPIToday, at the low end of the communication protocols, we find i²c (for ' inter-integrated Circuit ', Protocol) and SPI (for ' Serial

Codeforces Round #266 (Div. 2) C. Number of Ways

You ' ve got array a[1],? A[2],?...,? a [N], consisting ofn integers. Count the number of ways to split all the elements of the array into three contiguous parts so, the sum of elements in Each of the same.More formally, need to find the number of

Notes C-----Lowercase amounts into uppercase digits; When you click on the table, the TR line is currently clicked and the other rows do not change color; input hides the display

Public stringChangstringMoney ) { //convert lowercase amounts to uppercase amounts DoubleMyNumber =convert.todouble (Money); String[] Myscale= {"points","Angle","Yuan","Pick","Bai","Qian","million","Pick","Bai","Qian","billion",

POJ C Programming Advanced Programming Question # #: The number of the 2nd letter in a string

Programming Question #: Number 2nd in a stringSource: POJ (Coursera statement: The exercises completed on POJ will not count against the final results of Coursera. )Note: Total time limit: 1000ms memory limit: 65536kBDescribeEnter a string of no

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