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return statement

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Beendet aktuelle Funktion und kehrt angegebenen Wert an den Aufrufer Funktion .
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Terminates current function and returns specified value to the caller function.
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Inhaltsverzeichnis

[Bearbeiten] Syntax

return expression (1)
return (2)

[Bearbeiten] Erklärung

Die erste Version wertet die expression, beendet die aktuelle Funktion und gibt das Ergebnis der an den Anrufer expression Funktion. Die daraus resultierende Art der expression müssen konvertierbar sein Rückgabetyp funktionieren .
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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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Die zweite Version beendet die aktuelle Funktion. Nur gültig, wenn die Funktion Rückgabetyp ist 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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[Bearbeiten] Keywords

return

[Bearbeiten] Beispiel

#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';
}

Output:

1
4
2