Thread: matching the newline

I think this code might work (index overflow check must be added) :

int ar[100], i, ch;
for (i = 0; fscanf(fp, "%d%*[\t ]%1[\n]", &ar[i], &ch) == 1; i++)
;

Originally Posted by dwks

You should use code tags.

Does fscanf() return 1, or merely a positive number?

it returns the number of items scanned. the logic is inside the format
string, and it is as follows:
o scan a digit
o pass spaces and tabs, if any
o try to scan newline

so if fscanf returns 0 or -1, nothig had beed scanned and loop should stop.
if it returns 1, only digit had been scanned. fscanf() should eat all whitespaces up to the next digit.
if it returns 2, digit and newline scanned, so loop should stop.

Hi guys ,,

Now , I have another problem , I tried but it doesn't work , suppose we have data file as before

0 1 3 4
1 3
2 4

I don't need print out the 2ed row because is already in the first , I mean (1 3) in the 2ed row is duplicated , how can i do this !!!