Cpp Standard Library 简明教程 C++ Library - <iostream> Cpp Standard Library 简明教程 C++ Library - <iostream> Description 它用于标准输入/输出流库。 Declaration 下面是 iosstream 函数的声明。 C++98 Including this header may automatically include other headers, such as <ios>, <streambuf>, <istream>, <ostream> and/or <iosfwd>. C++11 Including <iostream> automatically includes also <ios>, <streambuf>, <istream>, <ostream> and <iosfwd>. Objects iostream 的对象应当如下： Narrow characters (char) Sr.No. Characters Definition 1 cin Standard input stream 2 cout Standard output stream 3 cerr 用于错误的标准输出流 4 clog 用于日志记录的标准输出流 Wide characters (wchar_t) Sr.No. Characters Definition 1 wcin Standard input stream (wide) 2 wcout SStandard output stream (wide) 3 wcerr 用于错误的标准输出流（宽） 4 wclog 用于日志记录的标准输出流（宽）