std::basic_string::substr

 

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

Devuelve una subcadena [pos, pos+count). Si la subcadena solicitado dura más allá del final de la cadena, o si count == npos, la subcadena devuelta es [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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Parámetros

pos	-	posición del primer carácter que desea 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	-	longitud de la subcadena 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 que contiene la subcadena [pos, pos+count) .

Original:

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

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Excepciones

std::out_of_range if pos > size().

Complejidad

Lineal en count

Original:

Linear in count

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Ejemplo

#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

Ver también

copy	copias personajes Original: copies characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función)