Namespace
Varianti

perror

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File input/output
Funzioni
Original:
Functions
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Accesso ai file
Original:
File access
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Diretta input / output
Original:
Direct input/output
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fread
fwrite
Ingresso formattato / uscita
Original:
Unformatted input/output
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Formattato di input / output
Original:
Formatted input/output
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File di posizionamento
Original:
File positioning
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ftell
fgetpos
fseek
fsetpos
rewind
La gestione degli errori
Original:
Error handling
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clearerr
feof
ferror
perror
Le operazioni sui file
Original:
Operations on files
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remove
rename
tmpfile
tmpnam
 
Defined in header <stdio.h>
void perror( const char *s );
Stampe a stderr il contenuto della stringa con terminazione null di caratteri puntata da s (a meno che s è un puntatore nullo), seguito dai due caratteri ": ", seguiti dalla realizzazione messaggio di errore definito descrive il codice di errore attualmente memorizzato nella variabile di sistema errno (identica all'uscita di strerror(errno)), seguita da '\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 strerror(errno)), followed by '\n'.
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Indice

[modifica] Parametri

s -
puntatore ad una stringa con terminazione null con il messaggio esplicativo
Original:
pointer to a null-terminated string with explanatory message
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[modifica] Valore di ritorno

(Nessuno)
Original:
(none)
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[modifica] Esempio

#include <fcntl.h>
#include <stdio.h>
 
int main()
{
    if (open("non_existent", O_RDONLY) == -1) {
        perror("open()");
    }
}

Output:

open(): No such file or directory

[modifica] Vedi anche

restituisce una versione di testo di un codice di errore visualizzato
Original:
returns a text version of a given error code
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(funzione) [edit]