std::setbase
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<metanoindex/>
<tbody> </tbody>| Definido no cabeçalho <iomanip>
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/*unspecified*/ setbase( int base ); |
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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.
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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.
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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. |
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.
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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);
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
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) | |