What is a file pointer?

• When a pointer is pointing to the address of a file than it is called as a file pointer.
  example:
  FILE *fp;
  File pointers are used to open,read,write and close files.
  
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• each file having two pointers called file pointers.They are input pointer and output pointer.The input pointer is used for reading the contents of a given file location.The output pointer is used for writing to a given location.
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