Thread: I need to read a line's end properly. Blank area problem.

I have an input text to read with fscanf function. I can read some of lines. But, I could not read a line. Can you help?
My input.txt:

54,ZeynepKucuk,62-46-59
62,OsmanBuyuk
46,GulayEr,25-23-32-14



I can read first and third line. But I have some problem with second line because its third position is empty.
But I can read surely if the input is like below


54,ZeynepKucuk,62-46-59
62,OsmanBuyuk,0
46,GulayEr,25-23-32-1

Some part of my code below

Code:

int id;
char name[100];
char friends[100];
FILE*dosya = fopen("input.txt","r");
struct node *root = NULL;
while(fscanf(dosya,"%d,%[^,],%s,%[^,],%s\n",&id, name, friends)==3){
    root = insertNewUser(root, id, name, friends);
}

After adding to tree my datas and print, expected output is:

54,ZeynepKucuk,62-46-59
62,OsmanBuyuk
46,GulayEr,25-23-32-1

Thanks for your response to my question.

Can you explain clearly please? Is it possible to talk in private?

Originally Posted by GReaper

Someone correct me if I'm wrong, but I think scanf returns the number of variables it managed to read for a reason. That reason is that if it fails to read, say, the third one, it has already read the previous two. So you only need to detect when it returns 2 instead of 3, and set a default value for friends.

Also, I'm not so sure your code works the way you think it does, because you need to add an asterisk ("%*[^,]" for example) to ignore input, as well as that your commas are doubled.

Correct in both cases. But I wouldn't use fscanf() to read the values since scanning the second line will return 3, anyway (62, "OsmanBuyuk" and "46"). Unless agahpar follows Salem's and your recomendations... I prefer to use strtok to separate the substrings...

Thank you all. I did it correctly. Special thanks to Salem.