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std::basic_streambuf::xsgetn

性病：基本[医]Streambuf：：sgetn，std：：basic[医]Streambuf：：xsgetn

std::streamsize sgetn( char_type* s, std::streamsize count (1)​
protected: virtual std::streamsize xsgetn( char_type* s, std::streamsize count (2)​

1%29次电话xsgetn(s, count)最派生的类。

2%29读count输入序列中的字符，并将它们存储到s这些字符读起来好像是通过反复调用sbumpc().如果少于count字符立即可用，函数调用uflow()提供更多直到traits::eof()会被归还。

参数

%280%29

返回值

成功读取的字符数。

例

另见

sputninvokes xsputn() (public member function)

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