petsc-3.8.3 2017-12-09
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UsingFortran

To use PETSc with Fortran you must use both PETSc include files and modules. At the beginning of every function and module definition you need something like

#include "petsc/finclude/petscXXX.h"
        use petscXXX

You can declare PETSc variables using either of the following.

   XXX variablename
   type(tXXX) variablename

For example,

#include "petsc/finclude/petscvec.h"
        use petscvec

   Vec b
   type(tVec) x

Level:beginner
Location:
include/petscsys.h
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/vec/vec/examples/tutorials/ex20f90.F90.html