File Handling
C provides two levels of file handling;these can be called high level and low level.
High level files are all treated as text files. In fact, the data which go into the files are exactly what would be seen on the screen, character by character, except that they are stored in a file instead. This is true whether a file is meant to store characters, integers, floating point types. Any file, which is written to by high level file handling functions, ends up as a text file which could be edited by a text editor
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