Write a C Program to display the following menu:
Menu
1. Display
2. Copy
3. Append
4. Exit
Accept the choice (1-4) from the user, and perform the
following tasks:
Choice 1: Accept a file name from the user and display the
file on screen
Choice 2: Accept two file names, and copy first file to the
second
Choice 3: Accept two file names, and append second file to
the first file
Choice 4: Terminate the program
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