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| C FAQ and Borland VCL Coding |
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C++ Interview Questions
Unless you're a hobbyist, at some point in your career you will be interviewed for a software development position. Software engineers are expected to be able to communicate their knowledge of their art and demonstrate their skills on demand. Prepare for your next C++ job interview by reviewing the questions on these pages.
Stringify __LINE__ using preprocessor directives
Create a string that contains the C++ filename and line number that a runtime error occurs on using preprocessor directives. Show how to stringify an integer (__LINE__).
Append or Create a Log File Using fopen()
Use fopen to create a file if it doesn't exist and to append to a file if it does exist.
FindFirst and FindNext Directory Listing Example
An example program shows how to use findfirst and findnext to drill into directories using user-specified attribute filters.
Create a Custom Icon for a Console Mode Application
Modify the default icon for a console-mode application. The modified resource can have both a 16-bit and a 32-bit icon. Each console-mode application can have a unqiue customized icon. Step-by-step instructions for modifying the icon are provided.
Loan Payment Calculator in DataFlex
There are some programs that are universal to programming -- the kind of program that everybody eventually makes. One of those programs is a loan payment calculator. As a student, you might need to calculate a monthly loan payment for a class project, or you might need to calculate it for the finance deptment for your business, or you might need it for yourself to find out the monthly payment for a car or house loan.
Detect Construction, Destruction, Copy and Assignment in C++ members
Use noisy.h (provided in the article) to easily detect when the data elements
of a struct or class are being automatically copied or assigned. The article is also a
bare-bones example of how to code a constructor, destructor, copy constructor and
assignment function (operator=()) in a C++ class.
Reading a text file into a vector
This sample program shows how to read a text file into a vector. It can be the launching point for a much larger program.
Compiling DataFlex Programs
A tutorial that presents a batch file that conveniently compiles arbitrary groups of DataFlex source files on a single command line. The filenames on the command line can contain wildcards.
Connecting an MS-Dos Application to a Printer on a USB Port on Windows 2000
How to connect an MS-Dos application to a Printer that uses a USB Port on Windows 2000. The technique involves associating a network name with an unused LPT port. DataFlex (a 16 and 32-bit application) can then write to the LPT port and the operating system redirects the job to the USB printer port.
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