Definition
An instanc I of the data type file_istream is an C++istream connected to a file F, i.e., all input operations or operators applied to I read from F.
Creation
| file_istream | I(string s); | creates an instance I of type file_istream connected to file s. |
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Operations
All operations and operators (>>) defined for C++istreams can be applied to file input streams as well.