Пространства имён
Варианты
Действия

std::showpos, std::noshowpos

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< cpp | io | manip

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C++
 
Библиотеки ввода / вывода
I / O манипуляторов
C-стиль I / O
Буферы
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(устарело)
Потоки
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Streams
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Абстракций
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Файл I / O
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Струнный I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Массив I / O
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Array I/O
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istrstream(устарело)
ostrstream(устарело)
strstream(устарело)
Типы
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Types
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streamoff
streamsize
fpos
Интерфейс Ошибка категории
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
Вход / выход манипуляторов
Плавающей точкой форматирования
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Floating-point formatting
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Целое форматирования
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Integer formatting
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Булевы форматирования
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Boolean formatting
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boolalpha
noboolalpha
Ширина полей и заполнения управления
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Field width and fill control
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Другие форматирования
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Other formatting
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showpos
noshowpos
Пробелы обработки
Original:
Whitespace processing
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Выходные промывки
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Output flushing
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Состояние флагов манипуляции
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Status flags manipulation
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Время и деньги I / O
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Time and money I/O
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get_money(C++11)
get_time(C++11)
put_money(C++11)
put_time(C++11)
 
Заголовочный файл <ios>
std::ios_base& showpos( std::ios_base& str );
 (1)
std::ios_base& noshowpos( std::ios_base& str );
 (2)
Включает или выключает дисплей плюс '+' вход неотрицательное целое выход. Не влияет на входе.
Original:
Enables or disables the display of the plus sign '+' in non-negative integer output. Has no effect on input.
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1)
позволяет showpos флага в потоке str как при вызове str.setf(std::ios_base::showpos)
Original:
enables the showpos flag in the stream str as if by calling str.setf(std::ios_base::showpos)
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2)
отключает showpos флага в потоке str как при вызове str.unsetf(std::ios_base::showpos)
Original:
disables the showpos flag in the stream str as if by calling str.unsetf(std::ios_base::showpos)
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Это I / O манипулятора, его можно назвать с выражением таких как out << std::showpos для любого типа out std::basic_ostream или выражения, такие как in >> std::showpos для любого типа in std::basic_istream.
Original:
This is an I/O manipulator, it may be called with an expression such as out << std::showpos for any out of type std::basic_ostream or with an expression such as in >> std::showpos for any in of type std::basic_istream.
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Содержание

[править] Параметры

str -
ссылка на поток ввода / вывода
Original:
reference to I/O stream
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[править] Возвращаемое значение

str (ссылка на поток после манипуляций)
Original:
str (reference to the stream after manipulation)
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[править] Пример

#include <iostream>
int main()
{
        std::cout << "showpos: " << std::showpos << 42 << ' ' << 3.14 << ' ' << 0 << '\n'
                  << "noshowpos: " << std::noshowpos << 42 << ' ' << 3.14 << ' ' << 0 << '\n';
}

Вывод: 

showpos: +42 +3.14 +0
noshowpos: 42 3.14 0

[править] См. также
очищает указанные флаги ios_base
Original:
clears the specified ios_base flags
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(функция) [edit]
устанавливает указанные флаги ios_base
Original:
sets the specified ios_base flags
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(функция) [edit]
Источник — «http://ru.cppreference.com/mwiki/index.php?title=cpp/io/manip/showpos&oldid=30830»