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std::perror

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Input / Output-Bibliothek
I / O-Manipulatoren
C-style I / O
Puffern
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Buffers
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basic_streambuf
basic_filebuf
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strstreambuf(veraltet)
Streams
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Types
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Fehlerbehandlung
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clearerr
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perror
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remove
rename
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tmpnam
 
Defined in header <cstdio>
void perror( const char *s );
Weiter zu stderr den Inhalt des null-terminierte Zeichenkette, auf die s (es sei denn s ist eine Null-Pointer), gefolgt von den beiden Zeichen ": ", durch die Implementierung definiert Fehlermeldung mit der Beschreibung des Fehlercodes derzeit im System-Variable gespeichert, gefolgt errno (identisch mit dem Ausgang des std::strerror(errno)), gefolgt von '\n' .
Original:
Prints to stderr the contents of the null-terminated character string pointed to by s (unless s is a null pointer), followed by the two characters ": ", followed by the implementation-defined error message describing the error code currently stored in the system variable errno (identical to the output of std::strerror(errno)), followed by '\n'.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

s -
Zeiger auf einen null-terminierten String mit erläuternden Nachricht
Original:
pointer to a null-terminated string with explanatory message
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[Bearbeiten] Rückgabewert

(None)
Original:
(none)
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[Bearbeiten] Beispiel

#include <cmath>
#include <cerrno>
#include <cstdio>
 
int main()
{
    double not_a_number = std::log(-1.0);
    if (errno == EDOM) {
        std::perror("log(-1) failed");
    }
}

Output:

log(-1) failed: Numerical argument out of domain

[Bearbeiten] Siehe auch

Makro, das auf POSIX-kompatiblen lokalen Thread-Fehler-Nummer variable
(Makro-Variablen) erweitert
Original:
macro which expands to POSIX-compatible thread-local error number variable
(Makro-Variablen)
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[edit]
gibt einen Text-Version eines bestimmten Fehlercode
Original:
returns a text version of a given error code
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(Funktion) [edit]
C documentation for perror