std::setbase
Da 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. |
| Definido no cabeçalho <iomanip>
|
||
| /*unspecified*/ setbase( int base ); |
||
Quando utilizado numa expressão out << setbase(base) ou in >> setbase(base), altera o sinalizador
basefield do fluxo out in ou, dependendo do valor de base: o valor 16 conjuntos basefield para std::ios_base::hex, o valor de 8 conjuntos std::ios_base::oct, o valor de 10 conjuntos std::ios_base::dec.Original:
When used in an expression out << setbase(base) or in >> setbase(base), changes the
basefield flag of the stream out or in, depending on the value of base: the value 16 sets basefield to std::ios_base::hex, the value 8 sets std::ios_base::oct, the value 10 sets std::ios_base::dec.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.
Valores de
base outro de 8, 10, ou 16 basefield reposto a zero, o que corresponde a saída decimal e prefixo-dependente de entrada.Original:
Values of
base other than 8, 10, or 16 reset basefield to zero, which corresponds to decimal output and prefix-dependent input.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
| base | - | novo valor para basefield
Original: new value for basefield 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
Devolve um objecto de tipo não especificado de tal forma que se
str é o nome de um fluxo de saída de tipo std::basic_ostream<CharT, Traits> ou std::basic_istream<CharT, Traits>, então a expressão str << setbase(base) str >> setbase(base) ou se comporta como se o seguinte código foi executado:Original:
Returns an object of unspecified type such that if
str is the name of an output stream of type std::basic_ostream<CharT, Traits> or std::basic_istream<CharT, Traits>, then the expression str << setbase(base) or str >> setbase(base) behaves as if the following code was executed: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.
str.setf(base == 8 ? std::ios_base::oct :
base == 10 ? std::ios_base::dec :
base == 16 ? std::ios_base::hex :
std::ios_base::fmtflags(0),
std::ios_base::basefield);
[editar] Exemplo
#include <iostream> #include <sstream> #include <iomanip> int main() { std::cout << "Parsing string \"10 0x10 010\"\n"; int n1, n2, n3; std::istringstream s("10 0x10 010"); s >> std::setbase(16) >> n1 >> n2 >> n3; std::cout << "hexadecimal parse: " << n1 << ' ' << n2 << ' ' << n3 << '\n'; s.clear(); s.seekg(0); s >> std::setbase(0) >> n1 >> n2 >> n3; std::cout << "prefix-dependent parse: " << n1 << ' ' << n2 << ' ' << n3 << '\n'; std::cout << "hex output: " << std::setbase(16) << std::showbase << n1 << ' ' << n2 << ' ' << n3 << '\n'; }
Saída:
Parsing string "10 0x10 010" hexadecimal parse: 16 16 16 prefix-dependent parse: 10 16 8 hex output: 0xa 0x10 0x8
[editar] Veja também
| muda a base utilizada para o inteiro I / O Original: changes the base used for integer I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função) | |
| controla se o prefixo é usado para indicar base numérica Original: controls whether prefix is used to indicate numeric base The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função) | |
