how would I know if the word being read by fgets is in a new line?

Question

I'm reading a program in C and I want to locate the new line, but i don't know how.

I'm reading the text file like this:

    while(!feof(fp)){
         fgets(buffer, 4, fp);
    }

and my text file is like this:

C01 RDA ALB NAC EDF
C02 MCA EDF SLF ADG

how would I know if the word being read by fgets is in a new line??

http://stackoverflow.com/questions/5431941/while-feof-file-is-always-wrong — William Pursell, Jan 09 '13 at 13:09

score 0 · Answer 1 · answered Jan 09 '13 at 13:10

0

You're not supposed to call feof() before doing I/O, that's simply not how it works.

If you're that interested in the location of each newline, read the file character by character instead, using fgetc(). Then parse the character stream into words. This will make it trivial to notice when a newline comes along.

answered Jan 09 '13 at 13:10

unwind

391,730
64
469
606

how can i parse it into words? – user1961360 Jan 09 '13 at 13:38

score 0 · Answer 2 · answered May 12 '14 at 13:12

Do you really want to get three characters at a time (which is what you get for size 4, because fgets reads one less than size characters), thus getting the pieces

C01 RD A A LB NAC ED F¶ C02 MC A E DF SLF AD G¶

(¶ denoting newline)? I don't think so, but rather you want four characters at a time and trim the word delimiters.

char buffer[5];
char newline = 1;
while (fgets(buffer, sizeof buffer, fp))
{
    if (newline) puts("new line:");
    newline = buffer[3] == '\n';
    buffer[3] = '\0';
    puts(buffer);
}

how would I know if the word being read by fgets is in a new line?

2 Answers2