IIR Filter Implementation using fdatool coefficients in C

Hi,

I'm trying to implement a real time IIR filter in C. I used the fdatool to generate a C header with the coefficients needed to implement the filter, but I don't know how exactly to use them. It's a 16th order filter, with 8 second order sections, and I can't seem to find any example code showing how to use the second order sections... Can anyone tell me how to go about doing this? Or perhaps direct me to some information on it?