std::setw
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| Definido no cabeçalho <iomanip>
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| /*unspecified*/ setw( int n ); |
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Quando utilizado numa expressão out << setw(n) ou in >> setw(n), define o parâmetro do fluxo de
width out ou in exactamente n. Este valor não é "pegajoso": a próxima entrada ou operação de saída que é afetado pelo valor do campo do fluxo width, repõe a zero (ou seja, "não especificado").Original:
When used in an expression out << setw(n) or in >> setw(n), sets the
width parameter of the stream out or in to exactly n. This value is not "sticky": the next input or output operation that is affected by the value of the stream's width field, resets it to zero (meaning "unspecified").The text has been machine-translated via Google Translate.
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Índice |
[editar] Parâmetros
| n | - | novo valor para a largura
Original: new value for width 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 << setw(n) str >> setw(n) 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 << setw(n) or str >> setw(n) behaves as if the following code was executed:The text has been machine-translated via Google Translate.
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str.width(n);
[editar] Exemplo
#include <sstream> #include <iostream> #include <iomanip> int main() { std::cout << "no setw: " << 42 << '\n' << "setw(6): " << std::setw(6) << 42 << '\n'; std::istringstream is("hello, world"); char arr[10]; is >> std::setw(6) >> arr; std::cout << "Input from \"" << is.str() << "\" with setw(6) gave \"" << arr << "\"\n"; }
Saída:
no setw: 42 setw(6): 42 Input from "hello, world" with setw(6) gave "hello"
[editar] Veja também
| manages field width (of std::ios_base função pública membro)
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| muda o caráter de preenchimento Original: changes the fill character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) | |
