Abstrakter Datentyp (ADT)
An Abstrakter Datentyp (ADT) is a theoretical concept in Informatik used to define Datenstrukturen based on their behavior from the point of view of a user, specifically the operations that can be performed on the data and the types of values it can hold. Unlike concrete Datentypen, which specify how data is stored and manipulated at a low level, ADTs focus on what operations are available and how they can be used.
Zum Beispiel, ein Stapel is an ADT that allows operations like push (adding an item) and pop (removing the most recently added item). The user of a stack does not need to know how these operations are implemented; they just need to understand that the stack operates on a last-in, first-out (LIFO) principle.
ADTs helfen Programmierern und Entwicklern, design systems and applications by providing a clear interface for data manipulation, thus promoting better code organization and separation of concerns. They are often implemented in various Programmiersprachen using classes, interfaces, or modules, which encapsulate the data and the operations that can be performed on it.
Zusammenfassend lässt sich sagen, dass ADTs zwar eine Möglichkeit bieten, Datentypen auf hohem Niveau zu definieren, sie jedoch nicht vorschreiben, wie diese Datentypen implementiert werden sollen. Diese Abstraktion ermöglicht Flexibilität bei der Implementierung, während gleichzeitig sichergestellt wird, dass die Operationen konsistent und zuverlässig bleiben.