What is the code for the following question?

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Write a program in C (without using any standard tools or library functions) to print the top N or/and bottom N lines of a given set of files. Print the first/last N lines of each FILE to standard output. With more than one FILE, precede each with a header giving the file name.
The way to invoke the program is:
a.out –q –h N –t N File1 File2 ....Filen (-h N – Print the top N lines from each file
-t N – The bottom N lines from each file)
-q – Do not print the header giving the file names

What I have tried:

tried to compile the code using different files.

Posted 11-May-20 19:01pm

Member 14829241

Updated 11-May-20 21:22pm

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Richard MacCutchan 12-May-20 3:39am

What code have you tried to compile? If you have a problem then you need to explain the details. We cannot help unless we can see what the code is trying to do.

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CPallini · Answer 1 · 2020-05-11T20:13:00

Solution 1

Roughly speaking you have two task:

Parse the command line (for options and arguments: the file names).
Read the files line by line, extracting the relevant info and reporting it.

The very fact that each option must be preceded by an hyphen simplyfy task (1).
For task (2) I would suggest you reading a good tutorial on C file I/O. See, for instance Basics of File Handling in C - GeeksforGeeks[^].

Posted 11-May-20 20:13pm

CPallini

Comments

Maciej Los 12-May-20 3:39am

Short And To The Point!

Member 14829241 14-May-20 10:05am

thank you so much but it would be really helpful if you could tell me what the code would be because im having errors. and this needs to be submitted as a project and i just cannot seem to get it right

RickZeeland · Answer 2 · 2020-05-11T21:22:00

Solution 2

See example here to get an idea how to handle files: C Program to Find the Number of Lines in a Text File[^]

For handling command line arguments, see: C Command Line Arguments | W3Schools | Tutorialspoint | W3Adda[^]

Posted 11-May-20 21:22pm

RickZeeland

Updated 11-May-20 21:24pm

v2

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Member 14829241 14-May-20 10:06am

thank you so much but it would be really helpful if you could tell me what the code would be because im having errors. and this needs to be submitted as a project and i just cannot seem to get it right

Maciej Los 14-May-20 13:56pm

5ed!