Namensräume
Varianten

    floating point literal

    Aus cppreference.com

    This page has been machine-translated from the English version of the wiki using Google Translate.

    The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here.

    Click here for the English version of this page

    <metanoindex/>

     
    C++
     
    Sprache C++
    Allgemeine Themen
    Original:
    General topics
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Flusskontrolle
    Original:
    Flow control
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Bedingte Ausführung Aussagen
    Original:
    Conditional execution statements
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Iterationsanweisungen
    Original:
    Iteration statements
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Gehe Aussagen
    Original:
    Jump statements
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Funktionen
    Original:
    Functions
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Funktion Erklärung
    Lambda-Funktion Erklärung
    Funktions-Template
    inline-Spezifizierer
    Exception-Spezifikationen (veraltet)
    noexcept Spezifizierer (C++11)
    Ausnahmen
    Original:
    Exceptions
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Namespaces
    Original:
    Namespaces
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Types
    Original:
    Types
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    decltype specifier (C++11)
    Specifiers
    Original:
    Specifiers
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    cv Planer
    Lagerdauer Planer
    constexpr Spezifizierer (C++11)
    auto Spezifizierer (C++11)
    alignas Spezifizierer (C++11)
    Initialisierung
    Original:
    Initialization
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Literale
    Original:
    Literals
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Expressions
    Original:
    Expressions
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    alternative Darstellungen
    Utilities
    Original:
    Utilities
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Types
    Original:
    Types
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    typedef declaration
    Typ Aliasdeklaration (C++11)
    Attribute (C++11)
    Wirft
    Original:
    Casts
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    impliziten Konvertierungen
    const_cast conversion
    static_cast conversion
    dynamic_cast conversion
    reinterpret_cast conversion
    C-Stil und funktionale Besetzung
    Speicherzuweisung
    Original:
    Memory allocation
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Classes
    Original:
    Classes
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Class-spezifische Funktion Eigenschaften
    Original:
    Class-specific function properties
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    explizit (C++11)
    statisch
    Besondere Member-Funktionen
    Original:
    Special member functions
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Templates
    Original:
    Templates
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Klassen-Template
    Funktions-Template
    Template-Spezialisierung
    Parameter Packs (C++11)
    Verschiedenes
    Original:
    Miscellaneous
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Inline Montage
     
    Fließkomma wörtliche definiert eine Kompilierung Konstante, deren Wert in der Quelldatei angegeben .
    Original:
    Floating point literal defines a compile-time constant whose value is specified in the source file.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.

    Syntax

    Ein Floating-Point-Literale haben zwei Syntax. Die erste besteht aus folgenden Teilen:
    Original:
    A floating-point literals have two syntaxes. The first one consists of the following parts:
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    • nichtleere Folge von Dezimalziffern mit einem Dezimalpunkt-Zeichen (definiert signifikant)
      Original:
      nonempty sequence of decimal digits containing a decimal point character (defines significant)
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • (optional) e oder E folgte mit optional Minus-oder Pluszeichen und nichtleere Folge von Dezimalziffern (definiert Exponent)
      Original:
      (optional) e or E followed with optional minus or plus sign and nonempty sequence of decimal digits (defines exponent)
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • (optional) ein Suffix Typspezifizierer als l, f, L oder F
      Original:
      (optional) a suffix type specifier as a l, f, L or F
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    Die zweite besteht aus folgenden Teilen:
    Original:
    The second one consists of the following parts:
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    • nichtleere Folge von Dezimalziffern (definiert signifikant)
      Original:
      nonempty sequence of decimal digits (defines significant)
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • e oder E folgte mit optional Minus-oder Pluszeichen und nichtleere Folge von Dezimalziffern (definiert Exponent)
      Original:
      e or E followed with optional minus or plus sign and nonempty sequence of decimal digits (defines exponent)
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • (optional) ein Suffix Typspezifizierer als l, f, L oder F
      Original:
      (optional) a suffix type specifier as a l, f, L or F
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    Das Suffix Typspezifizierer definiert die tatsächliche Art der Floating-Point-Literal:
    Original:
    The suffix type specifier defines the actual type of the floating-point literal:
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    • (Kein Nachsetzzeichen) definiert double
      Original:
      (no suffix) defines double
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • f F definiert float
      Original:
      f F defines float
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • l L definiert long double
      Original:
      l L defines long double
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.

    Erklärung

    Eine Dezimalzahl wissenschaftliche Schreibweise verwendet wird, bedeutet, dass der Exponent der Potenz von 10, mit dem die Bedeutung ist multiplied.
    ist
    Original:
    A decimal scientific notation is used, meaning that the exponent is the power of 10 by which the significant is multiplied.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Die mathematische Bedeutung 123e4 ist 123 × 10 4 </ sup>
    Original:
    The mathematical meaning of 123e4 is 123×104
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.

    Beispiel

    std::cout << 123.456e-67 << '\n'
          << .1E4f       << '\n'
          << 58.         << '\n'
          << 4e2         << '\n';

    Output: 

    1.23456e-65
1000
58
400