operators
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Überladen von Operatoren
Syntax
type operator op ( params ) ;
|
|||||||||
Erklärung
- <type> ist / sind die Art (en) der Variablen .Original:<type> is/are the type(s) of the variables.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - <op> die jeweiligen Betreiber (zB
+,+=,<<,>>,&&,||,%, etc.) .Original:<op> is the particular operator (e.g.+,+=,<<,>>,&&,||,%, etc.).The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - <params> ist / sind der Name (n) der erforderlichen Parameter (abhängig vom Netzbetreiber) .Original:<params> is/are the name(s) of the required parameters (depends on the operator).The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Einschränkungen
- Sie können keine neuen Operatoren wie
**oder&|.Original:You cannot create new operators such as**or&|.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Nicht alle Operatoren können überladen werdenOriginal:Not all operators can be overloadedThe text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Einige Betreiber kann nur als nicht statische Klasse Mitglieder überlastet werdenOriginal:Some operators can only be overloaded as non-static class membersThe text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Kurzschluss-Auswertung nicht mit überladenen Operatoren arbeitenOriginal:Short-circuit evaluation doesn't work with overloaded operatorsThe text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Operator Anrufe
Überladene Operatoren Aufruf erfolgt über den üblichen Infix-Notation werden
Original:
Overloaded operators can be called using the usual infix notation
The text has been machine-translated via Google Translate.
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a+b
oder eine Funktion-ähnlichen Notation
Original:
or a function-like notation
The text has been machine-translated via Google Translate.
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operator+(a,b)
Beispiel
#include <iostream>
using namespace std;
class Fraction{
private:
int numerator, denominator;
public:
Fraction(int n, int d): numerator(n), denominator(d) {}
// Note that the keyword operator combined with an actual
// operator is used as the function name
friend ostream& operator<<(ostream&, Fraction&);
};
ostream& operator<<(ostream& out, Fraction& f){
out << f.numerator << '/' << f.denominator;
return out;
}
int main(){
Fraction f1(3, 8);
Fraction f2(1, 2);
cout << f1 << endl;
cout << 3 << ' ' << f2 << endl;
return 0;
}
Output:
3/8
3 1/2