Open and Reading all the data in a txt file

Hello,

I have a simple .txt file  with several node id and coordinates of each node displacement in x,y,z

After open it with fopen command I want now to ensure I'm reading all all the data of the file not just the first line.

If I use the fscanf command I'm just reading the first line of my file right?

Do I have to create any logic or looping command or I have to create a general structure to read the file?

Many thanks.