std::basic_string::find
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<metanoindex/>
<tbody> </tbody> size_type find( const basic_string& str, size_type pos = 0 ) const; |
(1) | |
size_type find( const CharT* s, size_type pos, size_type count ) const; |
(2) | |
size_type find( const CharT* s, size_type pos = 0 ) const; |
(3) | |
size_type find( CharT ch, size_type pos = 0 ) const; |
(4) | |
Sucht das erste substring gleich dem angegebenen Zeichenfolge. Suche beginnt bei
pos, dh die gefundene Teilstring darf nicht in einer Position vor pos beginnen .Original:
Finds the first substring equal to the given character sequence. Search begins at
pos, i.e. the found substring must not begin in a position preceding pos.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
1)
Sucht das erste substring gleich
str . Original:
Finds the first substring equal to
str. The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
2)
Sucht das erste substring gleich den ersten
count Zeichen der Zeichenkette, auf die s. s gehören Nullzeichen .Original:
Finds the first substring equal to the first
count characters of the character string pointed to by s. s can include null characters.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
3)
Sucht das erste substring gleich der Zeichenkette, auf die
s. Die Länge der Zeichenfolge wird von der ersten Null-Zeichen bestimmt .Original:
Finds the first substring equal to the character string pointed to by
s. The length of the string is determined by the first null character.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
4)
Sucht das erste Zeichen
ch .Original:
Finds the first character
ch.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Parameter
| str | - | String zu suchen
Original: string to search for The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| count | - | Länge der Zeichenkette zu suchen
Original: length of substring to search for The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| s | - | Zeiger auf eine Zeichenfolge zur Suchanfrage
Original: pointer to a character string to seach for The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| ch | - | Charakter zu suchen
Original: character to search for The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Rückgabewert
Position des ersten Zeichens des gefundenen Teilstrings oder
npos wenn kein solches Teilstring gefunden .Original:
position of the first character of the found substring or
npos if no such substring is found.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Beispiel
#include <string>
#include <iostream>
void print(std::string::size_type n, std::string const &s)
{
if (n == std::string::npos) {
std::cout << "not found\n";
} else {
std::cout << "found: " << s.substr(n) << '\n';
}
}
int main()
{
std::string::size_type n;
std::string const s = "This is a string";
// search from beginning of string
n = s.find("is");
print(n, s);
// search from position 5
n = s.find("is", 5);
print(n, s);
// find a single character
n = s.find('a');
print(n, s);
// find a single character
n = s.find('q');
print(n, s);
}
Output:
found: is is a string
found: is a string
found: a string
not found