C++

在構造和析構期間不要調用虛函數，因為這樣的調用不會匹配到當前執行的建構函式或解構函式所屬的類的更深的派生層次。假設你有一套類比股票處理的類階層，例如，購入流程，出售流程等。對這樣的處理來說可以核查是非常重要的，所以隨時會建立一個 Transaction 對象，將這個建立記錄在核查日誌中是一個適當的要求。下面是一個看起來似乎合理的解決問題的方法：class Transaction { // base class for all 　public: //

註：以下內容部分引自CSND中相關討論的文章，並結合自己的理解整理而成。僅供參考。1)執行階段程式庫就是 C run-time library，是 C 而非 C++ 語言世界的概念:取這個名字就是因為你的 C 程式運行時需要這些庫中的函數.2)C 語言是所謂的“小核心”語言，就其語言本身來說很小（不多的關鍵字，程式流程式控制制，資料類型等）；所以，C 語言核心開發出來之後，Dennis Ritchie 和 Brian Kernighan 就用 C 本身重寫了 90% 以上的 UNIX 系統函數，

In Visual C++ 2005, the ATL, MFC, Standard C++, and CRT libraries support the new deployment model available on Windows XP, Windows Server 2003, and Windows Vista. The DLLs corresponding to all Visual C++ libraries have been grouped into several

assert(CRT)#include <assert.h>void assert( int expression );stdio.h VS cstdioIf you are writing c code, please use stdio.h; if c++, please use cstdio. Functionally, these two header files are the same. One difference is that all functions in

1. STL的auto_ptr缺點：1）一個對象只能被一個auto_ptr所擁有，即所有權轉移問題。2）因此，它不能用在STL的container中，所以，非常不實用。2. Boost的shared_ptrTR1中的std::tr1::shared_ptr就夠了（#include <memory>，use std :: tr1 :: shared_ptr using the VS2008 feature pack beta which doesn't involve Boost

三個WINDOWS SDK函數: WinExec，ShellExecute ，CreateProcess，可以實現調用其他程式的要求。WinExec這個函數最簡單，只有兩個參數，原型如下：       UINT WinExec(       LPCSTR lpCmdLine,    // 命令路徑       UINT uCmdShow       // 顯示方式      ;使用方法如下：WinExec("Notepad.exe", SW_SHOW);   //

轉載自：http://pangpengzhouwenwen.blog.163.com/blog/static/3007819220081182742178/ 1. __declspec(align(16)) struct SS{ int a,b; }; 它與#pragma pack()是一對兄弟，前者規定了對齊的最小值，後者規定了對齊的最大值。同時出現時，前者優先順序高。 __declspec(align())的一個

Static/globa dataLifecycle:All static data and global data would be stored in static/global storage area for the whole application. Dll's static and global data would be there of course. In general, two notes:When loading dll, before entering

In c++, we should keep using c style union. Although c++ union supports constructor, we'd better not use it. Actually, no need to use constructor for union basically. Going deeper, even as the expanded union in c++, it can't support constructor,

[MSDN]Objects and the Object Hierarchy Home Page (Objects) |  Overview |  FAQ |  Reference You can control the Visual C++ Developer Studio environment programmatically by manipulating it through Automation (formerly OLE Automation). For example,

[轉載自：http://www.cppblog.com/mzty/archive/2006/12/07/16101.html] 主要是兩個問題：指標截斷和資料對齊。C/C++移植的問題1 新的資料類型和函數1)固定精度：（跟X86或X64無關）TermDescriptionDWORD3232-bit unsigned integerDWORD6464-bit unsigned integerINT3232-bit signed integerINT6464-bit signed

[轉載自：http://www.vckbase.com/document/viewdoc/?id=1720] C++的static有兩種用法：面向過程程式設計中的static和物件導向程式設計中的static。前者應用於普通變數和函數，不涉及類；後者主要說明static在類中的作用。 一、面向過程設計中的static1、靜態全域變數在全域變數前，加上關鍵字static，該變數就被定義成為一個靜態全域變數。我們先舉一個靜態全域變數的例子，如下： //Example 1#include

February 9th, 2005, 11:07 AM http://www.codeguru.com/forum/showthread.php?t=327982C++ Design Pattern: What is a Design Pattern? Q: What is a Design Pattern?A: Design Patterns represent solutions to problems what arise when developing software within

We should know boxing and unboxing clearly. But what's the actual performance affect happened in that process? Below diagram can give a overview:A boxing process will bring in two copies of the same data on both stack and managed heap finally; while

using System;using System.Collections.Generic;using System.Linq;using System.Text;using Microsoft.Win32;using System.Security.Permissions;namespace RemoveTransReg{    class Program    {        static void Main(string[] args)        {           

The tradeoff between decimal and double is precision versus range. The decimal is the best choice when precision is required, but choose a double for the greatest range. The decimaltype is well suited for financial calculations, as shown in the

[轉載自：http://blog.csdn.net/byxdaz/archive/2010/01/14/5191314.aspx] C#中C/C++程式員注意問題

Whole topic can be found: C++ Exception Handling1. C++ Exception Specification(http://msdn.microsoft.com/en-us/library/wfa0edys%28VS.80%29.aspx)Visual C++ departs from the ANSI Standard in its implementation of exception specifications. The

there are three types of commenting syntax in C#:multiline, single line, and XML.XML Documentation CommentsIn addition to providing code commenting, an XML documentation comment supports tools that extract comments into an external XML document.

Logical OperatorsLogical operators perform Boolean logic on two expressions. There are three types of logical operators in C#: bitwise, Boolean, and conditional.The bitwise logical operators perform Boolean logic on corresponding bits of two