std::setbase
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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 outin 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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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.
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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);
[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) | |
