read from file one line at a time using fscanf

Hi!

I would like to know how I can read from a file, one line at a time using the function fscanf().

Actually, ideally, character by character as I need to store the characters in an array.

This should be done in C

Thanks

Ah, the always pleasant homework problem.

Welcome newbie. We don't do your homework, but lets take a simple look at that fscanf() function.

As I whip out my old C book, I see the format of the fscanf() function:


That is quite nice.

Seeing as strings are stored as character arrays in C, there is no other way to store them.

There are a few ways you could go about reading a line from the file.

1) Assuming each line is a set number of bytes, simply read that entire line into a char[].

2) Using a looping structure to (a) read until a newline character is encountered, or (b) until EOF.

I'm going to assume each line length is not know, so number 2 would work best in this situation.

In this situation, the code to read the character would be:


So, you have fscanf reading a character from infile to the line array.

If you want to try method (1):


This will reads in a line of 24 characters to the variable line array.

So, you've got that going on for yah. Now it's up to you to figure out the rest.

As you might have gathered I am not too good at this.

How would you write the conditional for the newline character?

Then practice, practice, practice.

The newline character is '\n'.

Jak_Jan,

Since you're so lost, it would be a really good idea to get together with your professor. Professors have office hours, and that's what you need. He will help you with your homework.