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Introduction using Files in c, Declaration of File pointer, Opening a file, Closing and Flushing files, working with Text Files, Character Input and Output, End of File (EOF). Working with
Understand the structure of indexed files and the relation between the index and the data file. Understand the idea behind hashed files and describe some hashing methods. Describe address collisions and how they can be resolved. Define directories and how they can be used to organize files. Distinguish between text and binary files . Objectives
Structures help programmers to group elements of different data types into a single logical unit (Unlike arrays which permit a programmer to group only elements of same data type).
Explain the importance of studying C programming language. Describe the characteristics and uses of C Program. Illustrate the structure of a C Programming language.
What is a file? A named collection of data, stored in secondary storage (typically). How is a file stored? Stored as sequence of bytes, logically contiguous (may not be physically contiguous on disk). The last byte of a file contains the end-of-file character ( EOF), with ASCII code 1A (hex).
Definition — File Metadata • Information . about. a file – Maintained by the file system – Separate from file itself – Usually attached or connected to the file • E.g., in block # –1 – Some information visible to user/application • Dates, permissions, type, name, etc. – Some information primarily for OS
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