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The function the stream's on success (setting them to ). In case of failure, is set.
Parameters filename String with the name of the file to open. Specifics about its format and validity depend on the library implementation and running environment. Mode Flags describing the requested input/output mode for the file. This is an object of the bitmask member type that consists of a combination of the following member constants: member constant stands for access in input File open for reading: the supports input operations. Out output File open for writing: the supports output operations. Binary binary Operations are performed in binary mode rather than text. Ate at end The output position starts at the end of the file.
App append All output operations happen at the end of the file, appending to its existing contents. Trunc truncate Any contents that existed in the file before it is open are discarded. These flags can be combined with the bitwise OR operator (|).