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Authors:
Tony Gaddis
Chapter:
Files And Exceptions
Exercise:
Checkpoint
Question:6 | ISBN:9780132576376 | Edition: 2

Question

When writing a program that performs an operation on a file, what two fileassociated names do you have to work with in your code?

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Answer

When writing a program that performs an operation on a file, you have to work with the following two file-associated names in your code:

File Name:

  • The file name is the name of the file you want to access or perform operations on.
  • It is used to identify the specific file you want to read from, write to, or perform other file-related operations.
  • The file name can include the file extension, which indicates the type of file (e.g., .txt for text files, .jpg for image files, etc.).
  • The file name is essential for opening the file using functions or methods like open() in Python or fopen() in C/C++. For example:
file_name = "data.txt"

File Handle (or File Object):

  • The file handle or file object is a reference or pointer to the opened file.
  • It is a data structure maintained by the operating system that allows the program to interact with the file.
  • The file handle is returned when the file is successfully opened and is used to read from or write to the file and perform other file-related operations.
  • The file handle is essential for reading or writing data to the file and for closing the file once the operations are complete.
  • In Python, file objects are created when you use the open() function to open a file. For example:
file_handle = open(file_name, "r")  # Opening the file in read mode

In C/C++, the file handle is represented by a FILE* pointer obtained from the fopen() function. For example:

FILE* file_handle = fopen(file_name, "r"); // Opening the file in read mode

It's important to handle files properly, including checking for errors while opening or closing the file and ensuring the file is closed after finishing the operations to avoid resource leaks and data corruption.

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