File Processing

Stream
A sequence of character that are stored as data.
There are 3 types of streams:

  • Input Stream
  • Output Stream
  • Error Stream
File

A collection of records
There are 2 types of file:

  • Text File
  • Binary File
Buffer Area

Part of the memory used as a temporary space before the data is moved to a file.
Syntax : FILE *fp;
Open File
To open a File, use fopen() : FILE *fopen (const char *filename, const char *mode );
fopen() : return a pointer to the start of a buffer area. Null will be returned if file is unable to open.
Possible mode Value :
“r”     = opening a file to be read.
"w”    = creating a file to be written.
“a”     = opening a File for data append.
“r+”   = opening a File for read/write.
“w+”  = creating file for read/write.
“a+”   = opening a File for read/append
“rb”    = opening a File (binary) to be read.
“wb”   = creating a file (binary) for write operation
Close File
To close file, use fclose() :  int fclose (FILE *stream);


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