My loop within loop won't work

I made a loop which reads from some lines a file.
It works fine but now I want the loop within another loop.

Once I remove the now commented loop in this code, it doen't show the printf anymore:

Code:

---


    //for(i = 0; j < 10; i++)
      //{ 
      for (j = 0; j < N_points - 2 ; j++)
          {
          fgets(string, 512, input);
          sscanf(string, "%lf %lf", &spectrum[i].wavelength[j], &spectrum[i].intensity[j]);
         
         
          printf ("\n %d\t%g    \t%g", j, spectrum[i].wavelength[j], spectrum[i].intensity[j]);
          }
      //}

---

Anyone know why?

i = 0; j < 10; i++)

Use a debugger. Maybe N_points <= 2, so the loop never runs at all.

EDIT:
Oh wait, once you remove the comments it does not work... haha, ok, vart is probably on the right track here.

Thanks vart, that was the problem :). Needed a fresh pair of eyes apparently.