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std::fgets

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Defined in header <cstdio>
char *fgets( char *str, int count, FILE *stream );
Liest höchstens count - 1 Zeichen aus der angegebenen Datei-Stream und speichert sie in str. Der erzeugte Zeichenfolge ist immer NULL-terminiert. Parsing stoppt, wenn am Ende der Datei auftritt oder ein Zeilenumbruch gefunden wird, in welchem ​​Fall str wird diese Zeilenvorschubzeichen enthalten .
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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Inhaltsverzeichnis

[Bearbeiten] Parameter

str -
reihen, um die Zeichen zu lesen
Original:
string to read the characters to
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count -
die Länge str
Original:
the length of str
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stream -
Datei-Stream zum Lesen der Daten aus
Original:
file stream to read the data from
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[Bearbeiten] Rückgabewert

str bei Erfolg NULL auf einem Irrtum
Original:
str on success, NULL on an error
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[Bearbeiten] Beispiel

#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
"

[Bearbeiten] Siehe auch

liest formatierten Eingaben von stdin, eine Datei-Strom oder einen Puffer
Original:
reads formatted input from stdin, a file stream or a buffer
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(Funktion) [edit]
liest eine Zeichenkette aus stdin
Original:
reads a character string from stdin
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(Funktion) [edit]
schreibt eine Zeichenkette in einer Datei-Stream
Original:
writes a character string to a file stream
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(Funktion) [edit]
C documentation for fgets