std::basic_string::find
Da cppreference.com
< cpp | string | basic string
 | This page has been machine-translated from the English version of the wiki using Google Translate. The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here. |
size_type find(const basic_string& str, size_type pos =0)const; | (1) | |
size_type find(const CharT* s, size_type pos, size_type count )const; | (2) | |
size_type find(const CharT* s, size_type pos =0)const; | (3) | |
size_type find( CharT ch, size_type pos =0)const; | (4) | |
Encontra a primeira substring igual a seqüência de caracteres. Pesquisa começa na
1) pos, ou seja, a substring encontrada não deve começar em uma posição anterior pos.Original:
Finds the first substring equal to the given character sequence. Search begins at
pos, i.e. the found substring must not begin in a position preceding pos.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.
Encontra a primeira substring igual a
2) str. Original:
Finds the first substring equal to
str. 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.
Encontra a primeira substring iguais aos caracteres
3) count primeiro da cadeia de caracteres apontada por s. s pode incluir caracteres nulos.Original:
Finds the first substring equal to the first
count characters of the character string pointed to by s. s can include null characters.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.
Encontra a primeira substring igual à cadeia de caracteres apontada por
4) s. O comprimento da corda é determinada pelo primeiro caractere nulo.Original:
Finds the first substring equal to the character string pointed to by
s. The length of the string is determined by the first null character.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.
Localiza o
ch primeiro caractere.Original:
Finds the first character
ch.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.
Índice |
[editar]Parâmetros
| str | - | string para procurar 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 | - | comprimento da substring a ser pesquisada 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 | - | ponteiro para uma cadeia de caracteres de pesquisa para a 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 | - | caracteres para pesquisa 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. |
[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.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.
[editar]Exemplo
#include <string>#include <iostream> void print(std::string::size_type n, std::stringconst&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::stringconst s ="This is a string"; // search from beginning of string n = s.find("is"); print(n, s); // search from position 5 n = s.find("is", 5); print(n, s); // find a single character n = s.find('a'); print(n, s); // find a single character n = s.find('q'); print(n, s);}
Saída:
found: is is a string found: is a string found: a string not found
[editar]Veja também
encontrar a última ocorrência de uma substring Original: find the last occurrence of a substring The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) | |
encontrar a primeira ocorrência de caracteres 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. (função pública membro) | |
encontrar primeira ausência de caracteres 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. (função pública membro) | |
encontrar última ocorrência de caracteres 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. (função pública membro) | |
encontrar ausência de última caracteres 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. (função pública membro) | |
