However, Microsoft provides many development environments that are suitable and make programming and debugging much easier. Microsoft Visual Studio is an ideal development environment for this tutorial if you have it available. As computers increase in processing power, the software they execute becomes more complex. This increased complexity comes at a cost of large programs with huge codebases that can quickly become difficult to understand, maintain and keep bug-free. These objects are naturally smaller entities, simplifying the development task of each unit. However, when the objects co-operate in a system, they become the building blocks of much more complex solution.
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If a car were designed as a single machine, it would be seen as hugely complex with lots of opportunities for failure. However, when broken down into its constituent parts, such as wheels, pedals, doors, etc. The creation of the parts can be simplified further when they are broken down into even simpler items. The car example is analogous to the object-oriented software. Rather than writing a huge program to create, for example, a project management system, the solution is broken into real-world parts such as project, task, estimate, actual, deliverable, etc. Each of these can then be developed and tested independently before being combined.
Before we start to examine any sample code, it is important to review the ideas that will be discussed. Some of the key concepts are described in the following sections. Classes and Objects The basic building blocks of object-oriented programming are the class and the object. A class defines the available characteristics and behaviour of a set of similar objects and is defined by a programmer in code. A class is an abstract definition that is made concrete at run-time when objects based upon the class are instantiated and take on the class’s behaviour. As an analogy, let’s consider the concept of a ‘vehicle’ class.