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Object Oriented Programming languages make developing programs to run on multiple operating systems much easier. All you need is a class library of common functions that has a separate version you can link in for each of the operating systems you want to support where the public interface to the multiple copies of those classes is the same for each platform. It is then a simple matter of linking in the appropriate verion of the library for each operating system.

Cross Platform Programming

When coding your C or C++ program (or any related language for that matter) you will need to specify that the files that you read and/or write be opened either in text mode or in binary mode. In this article we examine what the difference actually is between these two modes.

The Difference Between Binary and Text Files

If you are using a programming language that supports classes then obtaining a class library that supplies a lot of the common functionality that you need will save you a lot of time. Regardless of whether you actually do that or not there will be a whole lot of functionality that your projects will require that you will still need to code yourself. Rather than coding it separately for each project you will save yourself a lot of time and effort by creating your own reusable classes to handle these processes.

Defining a Class Library

PL/1 unlike many other programming languages provides direct access to define and call program interrupts. In this article we look at how it is done.

PL/1 Interrupts