Matrix input file format

[Evrim Dizemen]

Dear all,

I'm using Petsc 2.3.1 for my master thesis. I want to solve a linear 
problem Ax=b in parallel programming using MPICH with complex variables. 
I can get the A matrix from my fortran code but i can not find in which 
format i must write it for reading by Petsc. I'm really not familiar 
with c programming  so  I'll be happy for a solution in fortran.

THANKS,

Evrim