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std::swap(std::basic_filebuf)
std::swap(std::basic_fstream)
std::swap(std::basic_ifstream)
std::swap(std::basic_istringstream)
std::swap(std::basic_ofstream)
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std::streamoff

STD：流光

Defined in header ​​
typedef /*unspecified*/ streamoff;​​

类型std::streamoff一种有符号的完整类型，其大小足以表示操作系统支持的最大文件大小。通常，这是long long...

它用于表示类型的流位置%28值的偏移量。std::fpos29%。阿std::streamoff价值-1还用来表示某些I/O库函数的错误条件。

与性病的关系：：

  • 两者的区别std::fpos对象是类型的值。std::streamoff

  • 类型值std::streamoff可加或减std::fpos产生不同的std::fpos...

  • 类型值std::fpos隐式可转换为std::streamoff%28转换结果是文件%29开头的偏移量。

  • 类型值std::fpos从类型的值可构造std::streamoff

另见

fposrepresents absolute position in a stream or a file (class template)
seekgsets the input position indicator (public member function of std::basic_istream)
seekpsets the output position indicator (public member function of std::basic_ostream)

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