Espaços nominais
Variantes
    Ações

      std::wcstof, std::wcstod, std::wcstold

      De cppreference.com

      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.

      Click here for the English version of this page

      <metanoindex/>

       
      C++
       
      Biblioteca cordas
      Strings terminadas
      Original:
      Null-terminated strings
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
      Cadeias de bytes
      Multibyte cordas
      Cordas de largura
      Classes
      Original:
      Classes
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
       
      Strings terminadas largura
      Funções
      Original:
      Functions
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
      Manipulação personagem
      Original:
      Character manipulation
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
      Conversões para formatos numéricos
      Original:
      Conversions to numeric formats
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
      Manipulação de cadeia
      Original:
      String manipulation
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
      Manipulação matriz
      Original:
      Array manipulation
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
       
      <tbody> </tbody>
      Definido no cabeçalho <cwchar>
      float wcstof( const wchar_t* str, wchar_t** str_end );
      		 (desde C++11)
      double wcstod( const wchar_t* str, wchar_t** str_end );
      long double wcstold( const wchar_t* str, wchar_t** str_end );
      		 (desde C++11)
      Interpreta um valor de ponto flutuante em uma corda larga apontado por str.
      Original:
      Interprets a floating point value in a wide string pointed to by str.
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
      Função descarta quaisquer caracteres em branco (como determinado pela std::isspace()) até que caráter não-primeiro espaço é encontrada. Em seguida, ele toma como caracteres possível para formar uma representação de ponto flutuante válido e os converte em valor de ponto flutuante. O valor de ponto flutuante válido pode ser um dos seguintes:
      Original:
      Function discards any whitespace characters (as determined by std::isspace()) until first non-whitespace character is found. Then it takes as many characters as possible to form a valid floating point representation and converts them to floating point value. The valid floating point value can be one of the following:
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
      • expressão ponto decimal flutuante. Consiste nas seguintes partes:
        Original:
        decimal floating point expression. It consists of the following parts:
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • (opcional) mais ou de menos
        Original:
        (opcional) plus or minus sign
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • seqüência não vazia de dígitos decimais, opcionalmente contendo um caractere de ponto decimal (define significand)
        Original:
        nonempty sequence of decimal digits optionally containing a decimal point character (defines significand)
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • (opcional) e ou E seguiu com menos opcionais ou sinal de mais e não vazio seqüência de dígitos decimais (define expoente)
        Original:
        (opcional) e or E followed with optional minus or plus sign and nonempty sequence of decimal digits (defines exponent)
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • binário expressão de ponto flutuante. Consiste nas seguintes partes:
        Original:
        binary floating point expression. It consists of the following parts:
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • (opcional) mais ou de menos
        Original:
        (opcional) plus or minus sign
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • 0x or 0X
      • seqüência não vazia de dígitos hexadecimais opcionalmente contendo um caractere de ponto decimal (define significand)
        Original:
        nonempty sequence of hexadecimal digits optionally containing a decimal point character (defines significand)
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • (opcional) p ou P seguiu com menos opcionais ou sinal de mais e não vazio seqüência de dígitos hexadecimais (define expoente)
        Original:
        (opcional) p or P followed with optional minus or plus sign and nonempty sequence of hexadecimal digits (defines exponent)
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • infinito expressão. Consiste nas seguintes partes:
        Original:
        infinity expression. It consists of the following parts:
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • (opcional) mais ou de menos
        Original:
        (opcional) plus or minus sign
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • INF ou INFINITY ignorando o caso
        Original:
        INF or INFINITY ignoring case
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • não-um número-expressão. Consiste nas seguintes partes:
        Original:
        not-a-number expression. It consists of the following parts:
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • (opcional) mais ou de menos
        Original:
        (opcional) plus or minus sign
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      • NAN ou NAN(' char_sequence ) ignorando o caso da parte NAN. Char_sequence' só pode conter caracteres alfanuméricos. O resultado é uma tranquila NaN valor de ponto flutuante.
        Original:
        NAN or NAN(char_sequence) ignoring case of the NAN part. char_sequence can only contain alphanumeric characters. The result is a quiet NaN floating point value.
        The text has been machine-translated via Google Translate.
        You can help to correct and verify the translation. Click here for instructions.
      As funções define o ponteiro apontado pelo str_end para apontar para o caractere largo passado o último personagem interpretado. Se str_end é NULL, ele é ignorado.
      Original:
      The functions sets the pointer pointed to by str_end to point to the wide character past the last character interpreted. If str_end is NULL, it is ignored.
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.

      Parâmetros

      str -
      ponteiro para a string terminada em null amplo para ser interpretado
      Original:
      pointer to the null-terminated wide string to be interpreted
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
      str_end -
      ponteiro para um ponteiro para um caractere largo .
      Original:
      pointer to a pointer to a wide character.
      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

      Flutuando valor do ponto correspondente ao conteúdo do str em caso de sucesso. Se o valor convertido cai fora do alcance do tipo de retorno correspondente, o erro ocorre e intervalo HUGE_VAL, HUGE_VALF ou HUGE_VALL é devolvido. Se nenhuma conversão pode ser executada, é devolvido 0.
      Original:
      Floating point value corresponding to the contents of str on success. If the converted value falls out of range of corresponding return type, range error occurs and HUGE_VAL, HUGE_VALF or HUGE_VALL is returned. If no conversion can be performed, 0 is returned.
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.

      Exemplo

      Esta seção está incompleta
      Motivo: sem exemplo

      Veja também

      Documentação C para wcstof