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    std::atan2

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    definiert in Header <cmath>
    float       atan2(float y, float x );
    		 (1)
    double      atan2(double y, double x );
    		 (2)
    longdouble atan2(longdouble y, longdouble x );
    		 (3)
    Promoted    atan2( Arithmetic y, Arithmetic x );
    		 (4) (seit C++11)
    Berechnet den Arcustangens von y/x der Benutzung der Zeichen von Argumenten korrekt zu bestimmen Quadranten .
    Original:
    Computes the inverse tangent of y/x using the signs of arguments to correctly determine quadrant.
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    4)
    Wenn ein Argument hat integralen Typ, wird es double gegossen. Wenn ein anderes Argument longdouble ist, dann ist der Rückgabetyp longdouble ist, sonst ist es double .
    Original:
    If any argument has integral type, it is cast to double. If any other argument is longdouble, then the return type is longdouble, otherwise it is double.
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    Inhaltsverzeichnis

    [Bearbeiten]Parameter

    x, y -
    Floating-Point-Wert
    Original:
    floating point value
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    [Bearbeiten]Rückgabewert

    Arcustangens y/x im Bogenmaß im Bereich von [-π; π] Bogenmaß .
    Original:
    Arc tangent of y/x in radians in the range of [-π; π] radians.
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    Return value
    math-atan2.png
    X argument

    [Bearbeiten]Beispiel

    #include <cmath>#include <utility>#include <iostream>   std::pair<double, double> cartesian_to_polar(double x, double y){return{std::hypot(x, y), std::atan2(y,x)};}   int main(){std::pair<double, double> polar = cartesian_to_polar(1, 1);std::cout<<"(1,1) cartesian is ("<< polar.first<<","<< polar.second<<") polar\n";}

    Output: 

    (1,1) cartesian is (1.41421,0.785398) polar


    [Bearbeiten]Siehe auch

    berechnet Arcustangens (arctan(x))
    Original:
    computes arc tangent (arctan(x))
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    (Funktion)[edit]
    berechnet Arcussinus (arcsin(x))
    Original:
    computes arc sine (arcsin(x))
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    (Funktion)[edit]
    berechnet Arcuscosinus (arccos(x))
    Original:
    computes arc cosine (arccos(x))
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    (Funktion)[edit]
    berechnet Tangente (tan(x))
    Original:
    computes tangent (tan(x))
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    (Funktion)[edit]
    Von „https://de.cppreference.com/mwiki/index.php?title=cpp/numeric/math/atan2&oldid=29511“
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