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std::basic_string::rfind

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< cpp‎ | string‎ | basic string

 
 
Biblioteca cordas
Strings terminadas
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Null-terminated strings
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Cadeias de bytes
Multibyte cordas
Cordas de largura
Classes
Original:
Classes
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basic_string
char_traits
 
std::basic_string
Funções de membro
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Member functions
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basic_string::basic_string
basic_string::operator=
basic_string::assign
basic_string::get_allocator
acesso. Elemento
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Element access
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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
Iteradores
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Iterators
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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)
Capacidade
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Capacity
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basic_string::empty
basic_string::size
basic_string::length
basic_string::max_size
basic_string::reserve
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Operações
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Operations
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basic_string::clear
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basic_string::replace
basic_string::substr
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basic_string::swap
Pesquisar
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Search
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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
Constantes
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Constants
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basic_string::npos
Não-membros funções
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Non-member functions
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(C++11)
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(C++11)
to_string(C++11)
to_wstring(C++11)
Classes auxiliares
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Helper classes
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hash<std::string>
hash<std::wstring>
hash<std::u32string>
hash<std::u16string>
(C++11)
 
size_type rfind( const basic_string& str, size_type pos = npos ) const;
(1)
size_type rfind( const CharT* s, size_type pos, size_type count ) const;
(2)
size_type rfind( const CharT* s, size_type pos = npos ) const;
(3)
size_type rfind( CharT ch, size_type pos = npos ) const;
(4)

Finds the last substring equal to the given character sequence. Search begins at pos, i.e. only the substring [0, pos) is considered in the search. If npos is passed as pos whole string will be searched.

1) Finds the last substring equal to str.

2) Finds the last substring equal to the first count characters of the character string pointed to by s. s can include null characters.

3) Finds the last substring equal to the character string pointed to by s. The length of the string is determined by the first null character.

4) Finds the last character ch.

Índice

[editar] Parâmetros

str -
string para procurar
Original:
string to search for
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count -
comprimento da substring a ser pesquisada
Original:
length of substring to search for
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s -
ponteiro para uma cadeia de caracteres de pesquisa para a
Original:
pointer to a character string to seach for
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ch -
caracteres para pesquisa
Original:
character to search for
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[editar] Valor de retorno

posição do primeiro caractere da substring encontrado ou se não npos substring seja encontrado.
Original:
position of the first character of the found substring or npos if no such substring is found.
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[editar] Exemplo

#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 backwards from beginning of string
  n = s.rfind("is");
  print(n, s);
  // search backwards from position 4
  n = s.rfind("is", 4);
  print(n, s);
  // find a single character
  n = s.rfind('s');
  print(n, s);
  // find a single character
  n = s.rfind('q');
  print(n, s);
}

Output:

found: is a string
found: is is a string
found: string
not found

[editar] Veja também

encontrar caracteres na string
Original:
find characters in the string
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(função pública membro) [edit]
encontrar a primeira ocorrência de caracteres
Original:
find first occurrence of characters
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(função pública membro) [edit]
encontrar primeira ausência de caracteres
Original:
find first absence of characters
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(função pública membro) [edit]
encontrar última ocorrência de caracteres
Original:
find last occurrence of characters
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(função pública membro) [edit]
encontrar ausência de última caracteres
Original:
find last absence of characters
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(função pública membro) [edit]