All you need is a simple class that asks your object for each known interface. Here’s the class QI: #include #include #include class QI : public std::stringstream, protected CRegKey{protected: virtual
Suppose you need to make multiple inserts (or updates or deletes) to a SQL Server database?for instance, inserting items in a shopping cart. In the past, you needed to loop
Instead of writing a string class that contains a (char *), why not write a string class with a fixed char array? Of course, it would be repetitive if you
Consider this code: class CA{//…};class CB{//…};CA * CB2CA(CB *pb){ return dynamic_cast(pb);} The CA and CB are totally unrelated classes and the CB2CA function seems to be completely useless. However, what
A sparse array saves memory by not allocating memory for elements that are not initialized or to which you don’t need access. They’re quite easy using the STL map.This example
Use the following code: #include void main(){ char name[15]; double salary; ofstream outFile(“FileName.txt”, ios::in); while (outFile){ outFile >> name >> salary; }}
How to print out a Currency in Java is an often overlooked topic. How should Currency be printed out in an international, standardized way?The java.text.NumberFormat class is used for outputting
This wrapper class “FileCopier” copies data from one file to another. This class uses another class: “StreamCopier”. /** * Class: FileCopier * Author: Vivek Bagade * Date: 8/31/2001 * Description:
While it may seem logical to store a result in a variable just to use it as an argument to some function, sometimes it may be better to pass the