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return statement

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C++
 
Linguagem C++
Tópicos gerais
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General topics
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Controle de fluxo
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Flow control
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Declarações execução condicional
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Conditional execution statements
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goto statement
return statement
Funções
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decltype specifier (C++11)
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Assembly embutido
 
Termina função atual e retorna o valor especificado para a função de chamada.
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Terminates current function and returns specified value to the caller function.
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Índice

[editar] Sintaxe

return expression (1)
return (2)

[editar] Explicação

A primeira versão avalia o expression, termina a função atual e retorna o resultado da expression para a função de chamada. O tipo resultante da expression deve ser conversível para funcionar tipo de retorno.
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The first version evaluates the expression, terminates the current function and returns the result of the expression to the caller function. The resulting type of the expression must be convertible to function return type.
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A segunda versão termina a função atual. Válido somente se o tipo de retorno da função é void.
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The second version terminates the current function. Only valid if the function return type is void.
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[editar] Palavras-chave

return

[editar] Exemplo

#include <iostream>
 
void fa(int i) 
{
    if (i == 2) return;
    std::cout << i << '\n';
}
 
int fb(int i) 
{
    if (i > 4) return 4;
    std::cout << i << '\n';
    return 2;
}
 
int main() 
{
    fa(2);
    fa(1);
    int i = fb(5);
    i = fb(i);
    std::cout << i << '\n';
}

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