std::basic_string::substr

 

C++

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Libreria di Utilità

Stringhe

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Algoritmi

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Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Stringhe libreria

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

Byte stringhe

Multibyte stringhe

Stringhe larghe

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

basic_string

char_traits

 

std::basic_string

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

basic_string::basic_string

basic_string::operator=

basic_string::assign

basic_string::get_allocator

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basic_string::at

basic_string::operator[]

basic_string::front (C++11)

basic_string::back (C++11)

basic_string::data

basic_string::c_str

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basic_string::begin basic_string::cbegin (C++11)

basic_string::end basic_string::cend (C++11)

basic_string::rbegin basic_string::crbegin (C++11)

basic_string::rend basic_string::crend (C++11)

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

basic_string::empty

basic_string::size

basic_string::length

basic_string::max_size

basic_string::reserve

basic_string::capacity

basic_string::shrink_to_fit (C++11)

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basic_string::clear

basic_string::insert

basic_string::erase

basic_string::push_back

basic_string::pop_back (C++11)

basic_string::append

basic_string::operator+=

basic_string::compare

basic_string::replace

basic_string::substr

basic_string::copy

basic_string::resize

basic_string::swap

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basic_string::find

basic_string::rfind

basic_string::find_first_of

basic_string::find_first_not_of

basic_string::find_last_of

basic_string::find_last_not_of

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

basic_string::npos

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

operator+

operator== operator!= operator< operator> operator<= operator>=

swap(std::basic_string)

operator<< operator>>

getline

stoi stol stoll (C++11) (C++11) (C++11)

stoul stoull (C++11) (C++11)

stof stod stold (C++11) (C++11) (C++11)

to_string (C++11)

to_wstring (C++11)

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

hash<std::string> hash<std::wstring> hash<std::u32string> hash<std::u16string> (C++11)

 

basic_string substr( size_type pos =0,                      size_type count = npos );

Restituisce una sottostringa [pos, pos+count). Se la sottostringa richiesto dura oltre la fine della stringa, o se count == npos, la sottostringa restituita è [pos, size()).

Original:

Returns a substring [pos, pos+count). If the requested substring lasts past the end of the string, or if count == npos, the returned substring is [pos, size()).

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Parametri

pos	-	posizione del primo carattere da includere Original: position of the first character to include The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
count	-	lunghezza della sottostringa Original: length of the substring 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

String contenente il [pos, pos+count) sottostringa.

Original:

String containing the substring [pos, pos+count).

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Eccezioni

std::out_of_range if pos > size().

Complessità

Lineare in count

Original:

Linear in count

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Esempio

#include <string>#include <iostream>   int main(){std::string a ="0123456789abcdefghij";   std::string sub1 = a.substr(10);std::cout<< sub1 <<'\n';   std::string sub2 = a.substr(5, 3);std::cout<< sub2 <<'\n';   std::string sub3 = a.substr(12, 100);std::cout<< sub3 <<'\n';}

Output:

abcdefghij 567 cdefghij

Vedi anche

copy	copia caratteri (metodo pubblico)