Elementare Konzepte von Programmiersprachen

Zusammenfassung

Klassische Konzepte von Programmiersprachen sind Datentypen (types), Deklarationen/Definitionen (declarations/definitions), Ausdrücke (expressions), Anweisungen (statements) und Unterprogramme (Prozeduren, Funktionen, procedures, functions). Objektorientierte Sprachen führen zusätzlich das Konzept der (Objekt-)Klasse (class) ein, das wir in den Kapiteln 7 und 8 separat behandeln.

Every formula which the Analytical Engine can be required to compute consists of certain algebraical operations to be performed upon given letters, and of certain other modifications depending on the numerical value assigned to those letters.

There are therefore two sets of cards, the first to direct the nature of the operations to be performed — these are called operation cards: the other to direct the particular variables on which those cards are required to operate — these latter are called variable cards.

Charles Babbage (1864)