std::basic_string::substr
De cppreference.com
<metanoindex/>
<tbody> </tbody> basic_string substr( size_type pos = 0, size_type count = npos ); |
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Retorna uma substring
[pos, pos+count). Se a substring solicitado dura após o final da cadeia, ou se count == npos, a substring retornada é [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()). 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.
Parâmetros
| pos | - | posição do primeiro caractere a incluir
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 | - | comprimento da substring
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. |
Valor de retorno
String contendo o
[pos, pos+count) substring.Original:
String containing the substring
[pos, pos+count).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.
Exceções
std::out_of_range if pos > size().
Complexidade
Linear em
countOriginal:
Linear in
countThe 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.
Exemplo
#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';
}
Saída:
abcdefghij
567
cdefghij