Question: Can you explain and give me examples of pure virtual function? What is the difference between pure virtual function and virtual function? Answer: A pure virtual function is a

Question: I often need to split a string into a number oftokens based on delimiters specifiedby the user. I would appreciate information on how to tokenize a string in a

Question: In several programs, I need to use integers larger than those that can be held by unsigned long ints. I need to be able to multiply, divide, and mod

Question: In C, I use the FILE *filename. As a beginning C++ programmer, I open streams for reading and writing inside the main() function, but when I try to work

Question: Which model of C/C++ compiler offers the best value for a beginning programmer?(It must be ANSI C compatible.) Answer: The GNU G++ compiler. It’s free, ANSI C compatible and

Question: Is it possible to read integers from a file as integers, or must I read them as strings and then convert them to integers? Answer: In C++ the streams

Question: I need to know what the class or function called “friend” is. My teacher explained it in class, but I don’t quite understand how to call it and declare

Question: What is the proper way to dynamically allocate a 2D array using the new operator?Here’s a code fragment:int num = 50;int **stuff;stuff = new int[num][num];My compiler (g++) returns the

Question: This is actually a simpler form of the real problem I am dealing with. I have a array of char like so:char name[20];Then, I try to put a string

Question: How can I provide my own predicate for the list::sort method in Visual C++ 5.0? The method appears to require that any function object passed must be derived from

Question: For a reference counted implementation, how is the operator+= member function coded? The function receives (const String & rhs) and returns String &. The returned String &

Question: Consider the following piece of code:#include /* C++ String class */static String s(“hello”);main() { // … your code s += ” world”; // …}Question: String class uses the new

Question: Suppose I’ve got the following class hierarchies:Surface_PlotContourSurface_Plot, child of Surface_PlotSurface_DataGridSurface_Data, child of Surface_DataSurface_Plot contains a Surface_Data object, ContourSurface_Plot contains a GridSurface_Data object.What is the most elegant way to arrange

Question: Why do I need private inheritance in C++?Is it true that (in C++) function parameters are pushed onto the stack from right to left? If so, why? Answer: Use

Question: I got a warning when I compiled my C++ program onHP-UX:Line 219: Warning: Namespace is a future reserved keyword (215).What does this mean? Answer: It means exactly what it

Question: How can I convert characters to ASCII values and vice versa? Answer: There are no functions in JavaScript that make it easy to obtain ASCII values of characters and

Question:   Answer: JavaScript can be used to access values in web form input fields. This is possible because JavaScript treats input fields as objects with several properties. One of

Question: How can I write a cookie in one page and then read that cookie in another? or alternatively pass data gathered in one page (not a remote!) and then

Question:   Answer: You are probably familiar with a special value in JavaScript called null. This is a value you can assign to a variable when you want to indicate

Question:   Answer: Many people have been asking how to do this. Since JavaScript does not have built-in methods for converting numbers to currency-formatted strings, the only option left is

Question: I need to know how to retrieve multiple data and put it in a listbox. This data is also indexed to another database by it customer id. I can

Question: I have a database with a field set to Date/Time.My project has a variable that is of type Date.In a text box it displays 04/21/97. I cannot get the

Question: How do you lock down a form so that when the program is run, you can not move it. What I want to do is have one main form,

Question: I’ve wanted to upgrade my VB4 pro to VB5 ent. for a month or so now, but after monitoring various VB newsgroups for a few weeks I’m glad I

Question: I have noticed that each for project I create there is a file with a vbw extension. I found this type file mentioned in VB Help as a Visual

Question: Is there a way in VB5 to immediately print single lines of text to a printer for logging events? I had some success in VB4 by directly opening LPT1

Question: How do you run Access queries in VB? Answer: Queries that you have defined in Access can be opened just like tables,using the OpenRecordset method of the database. If

Question: A new user, no experience, but a self motivator, I need to know if I need a data base program, or is there one included in VB 5. How

Question: I’m very interested in learning VB for windows. im thinking about getting the professional editionupgrade, but $150 is pretty expensive for me right now. is the learning edition going

Question: Should I upgrade to VB5.0. I currently am using VB4.0 to make a simple program to run on win3.1 and win95. I want to distribute this program on diskette