operators
De cppreference.com
<metanoindex/>
Sobrecarga de operador
Sintaxe
type operator op ( params ) ;
|
|||||||||
Explicação
- <type> é / são o (s) das variáveis .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> é o operador particular (por exemplo
+,+=,<<,>>,&&,||,%, 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> é / são o (s) nome dos parâmetros necessários (depende da operadora).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.
Restrições
- Você não pode criar novos operadores, como
**ou&|.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. - Nem todos os operadores podem ser sobrecarregadosOriginal: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. - Algumas operadoras só pode ser sobrecarregado como membros não-estáticos da classeOriginal: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. - Avaliação curto-circuito não funciona com operadores sobrecarregadosOriginal: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.
Convida operador
Operadores sobrecarregados podem ser chamadas usando a notação infixa habitual
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
ou uma função semelhante a notação
Original:
or a function-like notation
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operator+(a,b)
Exemplo
#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;
}
Saída:
3/8
3 1/2