C Function main function

Description

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1. The main() Function
2. Uses a command line argument.
3. To access an individual character in one of the command line arguments, add a second index to argv.
4. Count down from command line input
5. Uses command-line arguments
6. Pass Arguments to a Program from the Command Line
7. Accessing command-line arguments.
8. Converts command-line argument to number



9. Reads commandline items by using arguments to main()
10. Echo the command-line arguments in reverse word order
11. Write a program that sequentially displays on screen all the files listed in the command line.