Thread: skipping white spaces file and going back one line in a file

I have a file with a bunch of numbers to read that i want to store in structure like a Person that has age, id and so on.
There are 2 problems. First is that each line either has one of the things like age or id or it's just white space.
Second is that i have 10 variables to fill for a structure iam using but not all of them will data for each variable in the file which is a problem because it's harder to figure out when i finished reading for the current structure.
Is there any way to go back to start of previous line? Here's input for a clearer idea:

Joe

1

32

Charlie



2

Chris

Something random like that...
I was using trying with fgets and then isspace to detect white spaces but theres the problem that while iam skipping i will go to start of line of following person and i have pre condition in loop to start that in start of loop. Iam not aware of o wat to jump back to start of previous line that was read.

Thanks in advance

Well if you're going to be ignoring the white space anyways, you could use fscanf() instead.

Are you sure you have empty lines, and not just odd-ish newlines? Maybe CR LF?

Other than that, it looks like you have one value per line:

Joe
1
32
Charlie
Missing field
2
Chris
Missing field
Missing field

This should be very easy to parse.