Question: I’ve declared a pointer to integer in file A of project. The pointer is also being used by file B of the same project. I discovered that the pointer’s

Question: I am a high school student using MS VC++ version 5.0 for my school science project. I am loading bitmaps with the StretchBlt function in the OnPaint function to

Question: A quick question that should be a quick one for an experienced PB guru. How do you attach/add a help file that was created in Winhelp or any other

Question: Is there a work around the SQL server 16 table limitation? Maybe temporary tables, Access, or even denormalization of the database tables? The database is large and very complex

Question: I have an OWL application in C++. I need to be able to switch in run-time between wordwrap and no-wordwrap text in the Editor window. How can I do

Question: Right now i’m still learning Visual C++, version 4.0. It may seem like the easiest thing in batch or Basic languages, but I can’t figure out how to clear

Question: How can I access the parallel port to control a car which can move in any direciton.I want to control each pin seperately. If you have any tutorial or

Standard C++ states that operator new should throw an exception of type std::bad_alloc when it fails. This is different from previous stages of C++ and it means two important things:

A function that may throw an exception can warn its users about that by specifying a list of exceptions it may throw, thus helping its users to catch such exceptions

When overloading an operator to support a user-defined type (object), it is best to adhere to the basic semantics of that built-in operator. For instance, the built-in operator ==, which

Standard C++ supports a built-in Boolean type: Bool. Variables of this type are can be assigned either a true or false values exclusively ( true and false are now reserved

Both standard C and Standard C++ support struct assignment using = . In fact, C++ programmers are often surprised to discover that assignment operator applies also to plain structs, and

Question: How can i add many java objects to a file then retrieve them as Java objects from the file? Answer: Java 1.1 introduced a concept called serialization. Serialization isa

There are cases when you need to define a constant pointer to a variable/object; for instance, when taking a function address, or when you want to protect a pointer from

Unlike structs, classes, enums, and unions, the enclosing brace of a namespace definition does not prohibit you from further extensions to that namespace. A namespace can be extended this way:

Question: Is it possible to preserve an object from garbagecollection (to live as long as the applet)? Answer: Yes, it is possible to preserve an object from garbage collection andlive

Question: Is there a way in Java to handle Unix signals(i.e. to trap a Control C signal)? Answer: You can handle Unix signals only by writing native code. However, theJava

Question: I have just read a packet of data into a byte array from a socket. At offsets 5-8, 9-12, and 13-16 are binary integers. How can I get them

Question: I have two classes in two separate files. I don’t want to use an interfacebecause the types of objects I’ll instantiate dynamically can be quitedifferent each time. What can

Question: What exactly is a Factory or Factory class? Answer: A Factory is a class that you use to create sets of related objects withoutexplicitly invoking their constructors. You usually

Question: Is there an easy way to assign each bit in a byte, and how do Iaccess those bits individually? Answer: Usually, if you come from a C programming background,

The canonical design of multithreaded applets is inherently flawed. You know what I’m talking about: the run method with the repaint/sleep statements embedded in a while(true). Any self-respecting operating systems

Instead of using #define macros to create a set of values, as in this (deprecated) example: #define JAN 1#define FEB 2//…#define DEC 12 Enum types are a significantly better choice:

Sometimes, an object must be converted into a built-in type (for instance, a string object passed as an argument to C function such as strcmp()) : //file Mystring.hclass Mystring {

When you instantiate an automatic object (e.g., on the stack) using its default constructor, mind that the correct syntax is: String str; //correct And not this: String str(); //entirely different

When designing a class hierarchy, you may face a decision between inheritance (aka IsA ) vs. containment (aka HasA) relation. For instance, if you are designing a Radio class, and

If a class may serve as a base class for others, its destructor should be virtual. This ensures RTTI support for objects of this class and objects derived from it,

When you have to “unconst” an object, as in this case: void print( unsigned char* c) { cout

When an array of object is instantiated, the default constructor (and only the default constructor) of each member is invoked automatically. If you define no constructors at all, the compiler

Struct instances created on the stack are uninitialized (i.e., contain garbage values). The easiest, most efficient, and future-proof way to initialize them is: struct PlainData {char [20] name;long ID;char [15]