std::fgets

 

C++

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Ingresso / libreria di output

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C-style I / O

Buffer Original: Buffers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_streambuf

basic_filebuf

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strstreambuf (deprecato)

Streams Original: Streams The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Astrazioni Original: Abstractions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

ios_base

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File I / O Original: File I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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String I / O Original: String I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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basic_stringstream

Array I / O Original: Array I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

istrstream (deprecato)

ostrstream (deprecato)

strstream (deprecato)

Tipi Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

streamoff

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fpos

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iostream_category (C++11)

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C-style I / O

Funzioni Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Accesso ai file Original: File access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fopen freopen fclose fflush	fwide setbuf setvbuf
Diretta input / output Original: Direct input/output The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fread
fwrite
Ingresso formattato / uscita Original: Unformatted input/output The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fgetc fgets fputc fputs getchar gets putchar puts ungetc	fgetwc fgetws fputwc fputws getwchar putwchar ungetwc
Formattato di input / output Original: Formatted input/output The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
scanf fscanf sscanf vscanf vfscanf vsscanf (C++11) (C++11) (C++11) printf fprintf sprintf snprintf (C++11) vprintf vfprintf vsprintf vsnprintf (C++11)	wscanf fwscanf swscanf vwscanf vfwscanf vswscanf (C++11) (C++11) (C++11) wprintf fwprintf swprintf vwprintf vfwprintf vswprintf
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ftell
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clearerr
feof
ferror
perror
Le operazioni sui file Original: Operations on files The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
remove
rename
tmpfile
tmpnam

 

Elemento definito nell'header <cstdio>
char*fgets(char*str, int count, FILE *stream );

Legge a personaggi più count -1 dal flusso di file dato e li memorizza in str. La stringa di caratteri prodotta è sempre NULL-terminato. Parsing si arresta se end-of-file di verifica o un carattere di nuova riga viene trovato, nel qual caso str conterrà quel personaggio capo.

Original:

Reads at most count -1 characters from the given file stream and stores them in str. The produced character string is always NULL-terminated. Parsing stops if end-of-file occurs or a newline character is found, in which case str will contain that newline character.

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Parametri

str	-	stringa per leggere i caratteri Original: string to read the characters to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
count	-	la lunghezza di str Original: the length of str The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
stream	-	stream file per leggere i dati Original: file stream to read the data from The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

str in caso di successo, NULL su un errore

Original:

str on success, NULL on an error

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Esempio

#include <iostream>#include <cstdio>#include <cstdlib>   int main(){ FILE* tmpf =std::tmpfile();std::fputs("Alan Turing\n", tmpf);std::fputs("John von Neumann\n", tmpf);std::fputs("Alonzo Church\n", tmpf);   std::rewind(tmpf);char buf[8];while(std::fgets(buf, sizeof buf, tmpf)!=NULL){std::cout<<'"'<< buf <<'"'<<'\n';}}

Output:

"Alan Tu" "ring " "John vo" "n Neuma" "nn " "Alonzo " "Church "

Vedi anche

scanf fscanf sscanf	legge l'input formattato da stdin, un flusso di file o di un buffer Original: reads formatted input from stdin, a file stream or a buffer The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
gets	legge una stringa di caratteri da stdin Original: reads a character string from stdin The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
fputs	Scrive una stringa di caratteri in un flusso di file Original: writes a character string to a file stream The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
C documentation for fgets