std::fpos

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C++
 
输入/输出库
I / O操纵
C-风格的I / O
缓冲区
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Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf（过时了）
流
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Streams
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抽象
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
文件I / O
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
字符串I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
阵列的I / O
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Array I/O
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istrstream（过时了）
ostrstream（过时了）
strstream（过时了）
类型
Original:
Types
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streamoff
streamsize
fpos
Error类的接口
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Error category interface
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iostream_category（C++11）
io_errc（C++11）
 
Defined in header <ios>
template< class State >
class fpos;
专业化的类模板std::fpos识别流或在一个文件中的绝对位置。每个对象类型fpos持有的字节流中的位置（通常作为一个私有成员的类型std::streamoff）和当前的移动状态，State（通常是一个类型的值std::mbstate_t）
Original:
Specializations of the class template std::fpos identify absolute positions in a stream or in a file. Each object of type fpos holds the byte position in the stream (typically as a private member of type std::streamoff) and the current shift state, a value of type State (typically std::mbstate_t).
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四个专业std::fpos
Original:
Four specializations of std::fpos are provided:
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Defined in header <ios>
类型
Original:
Type
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 Definition
streampos std::fpos<std::char_traits<char>::state_type>
u16streampos std::fpos<std::char_traits<char16_t>::state_type>
u32streampos std::fpos<std::char_traits<char32_t>::state_type>
wstreampos std::fpos<std::char_traits<wchar_t>::state_type>

[编辑] 成员函数
获取/设置值的移位状态
Original:
gets/sets the value of the shift state
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（公共成员函数）
此外，下面的成员函数和运营商必须提供，虽然它的指定，如果他们是成员或非成员.
Original:
In addition, the following member functions and operators must be provided, although it's unspecified if they are members or non-member.
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  • 构造函数接受一个参数的类型int的
    Original:
    A constructor that accepts an argument of type int.
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  • 的构造函数接受一个参数的类型std::streamoff。此构造还必须接受特殊的价值std::streamoff(-1)：以这种方式构造的std::fpos传回的一些流操作来表示错误.
    Original:
    A constructor that accepts an argument of type std::streamoff. This constructor must also accept the special value std::streamoff(-1): the std::fpos constructed in this manner is returned by some stream operations to indicate errors.
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  • 转换操作符转换fposstd::streamoff的偏移量std::fpos(0)值等于.
    Original:
    A conversion operator that converts fpos to std::streamoff with the value equal to the offset from std::fpos(0).
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  • operator==比较两个对象的类型std::fpos和返回值的类型转换为bool
    Original:
    operator== that compares two objects of type std::fpos and returns a value of type convertible to bool
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  • operator!=比较两个对象的类型std::fpos和返回值的类型转换为bool
    Original:
    operator!= that compares two objects of type std::fpos and returns a value of type convertible to bool
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  • operator+operator+=可以添加std::streamoffstd::fpos
    Original:
    operator+ and operator+= which can add std::streamoff to std::fpos
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  • operator-和operator-=可以减去std::streamoff从std::fpos
    Original:
    operator- and operator-= which can subtract std::streamoff from an std::fpos
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  • operator-可以减去两个对象的类型std::fpos产生std::streamoff
    Original:
    operator- which can subtract two objects of type std::fpos producing an std::streamoff
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[编辑] 另请参阅
表示相对文件/流的位置（偏离FPOS），足以代表任何文件的大小
Original:
represents relative file/stream position (offset from fpos), sufficient to represent any file size
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（的typedef）
返回的输出位置指示器
Original:
returns the output position indicator
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（公共成员函数of std::basic_ostream） [edit]
设置输出位置指示器
Original:
sets the output position indicator
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（公共成员函数of std::basic_ostream） [edit]
获取文件位置指示器
Original:
gets the file position indicator
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（函数） [edit]
来自“http://zh.cppreference.com/mwiki/index.php?title=cpp/io/fpos&oldid=27675”