std::basic_string::rfind


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.

str	-	検索する文字列 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	-	を検索するための文字列の長さ 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	-	※更に用する文字列へのポインタ 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	-	文字を検索します 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.

[編集] 値を返します

そのような部分文字列が見つからなかった場合は見つかった部分文字列またはnposの最初の文字の位置.

[編集] 例

このコードを実行します

#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);
}

出力:

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

[編集] 参照


find	文字列内の文字を見つける Original: find characters in the string The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数) [edit]

find_first_of	文字が最初に現れる位置を見つける Original: find first occurrence of characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数) [edit]

find_first_not_of	文字の最初の不在を見つける Original: find first absence of characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数) [edit]

find_last_of	文字が最後に現れる場所を見つける Original: find last occurrence of characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数) [edit]

find_last_not_of	最後の文字が存在しないことを見つける Original: find last absence of characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数) [edit]

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std::basic_string::rfind

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[編集] パラメータ

[編集] 値を返します

[編集] 例

[編集] 参照

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