September 2024
Intermediate to advanced
798 pages
18h 56m
German
Content preview from Arduino Kochbuch, 3. Auflage
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Mathematische Operationen
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3.0 Einleitung
Fast jede Skizze verwendet mathematische Operationen, um den Wert von Variablen zu manipulieren. Dieses Kapitel gibt einen kurzen Überblick über die gängigsten mathematischen Operationen. Wenn du dich bereits mit C oder C++ auskennst, bist du vielleicht versucht, dieses Kapitel zu überspringen, aber wir empfehlen dir, es noch einmal durchzulesen, denn es gibt einige Redewendungen, die von Arduino-Programmierern verwendet werden und auf die du vielleicht stößt, auch wenn du sie selbst nicht verwendest (z. B. die Verwendung von bitSet, um den Wert eines Bits zu ändern). Wenn du dich mit C und C++ nicht auskennst, solltest du dir eines der im Vorwort erwähnten C-Referenzbücher ansehen.
3.1 Addieren, Subtrahieren, Multiplizieren und Dividieren
Problem
Du willst einfache mathematische Operationen mit Werten in deinem Sketch durchführen. Du möchtest die Reihenfolge, in der die Operationen ausgeführt werden, kontrollieren und musst eventuell verschiedene Variablentypen behandeln.
Lösung
Verwende den folgenden Code:
intmyValue;myValue=1+2;// additionmyValue=3-2;// subtractionmyValue=3*2;// multiplicationmyValue=3/2;// division (the result is 1)
Diskussion
Addition, Subtraktion und Multiplikation für ganze Zahlen funktionieren so, wie du es erwartest.
Bei der Ganzzahlendivision wird ...
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