2: static char help[] = "Tests MatILUFactorSymbolic() on matrix with missing diagonal.\n\n";

  4: #include <petscmat.h>
  5: #include <petscpc.h>

  9: int main(int argc,char **args)
 10: {
 11:   Mat            C,A;
 12:   PetscInt       i,j;
 14:   PetscScalar    v;
 15:   PC             pc;
 16:   Vec            xtmp;

 18:   PetscInitialize(&argc,&args,(char*)0,help);

 20:   MatCreate(PETSC_COMM_WORLD,&C);
 21:   MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,3,3);
 22:   MatSetFromOptions(C);
 23:   MatSetUp(C);
 24:   VecCreateSeq(PETSC_COMM_WORLD,3,&xtmp);
 25:   i    = 0; j = 0; v = 4;
 26:   MatSetValues(C,1,&i,1,&j,&v,INSERT_VALUES);
 27:   i    = 0; j = 2; v = 1;
 28:   MatSetValues(C,1,&i,1,&j,&v,INSERT_VALUES);
 29:   i    = 1; j = 0; v = 1;
 30:   MatSetValues(C,1,&i,1,&j,&v,INSERT_VALUES);
 31:   i    = 1; j = 1; v = 4;
 32:   MatSetValues(C,1,&i,1,&j,&v,INSERT_VALUES);
 33:   i    = 2; j = 1; v = 1;
 34:   MatSetValues(C,1,&i,1,&j,&v,INSERT_VALUES);

 36:   MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);
 37:   MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);

 39:   MatView(C,PETSC_VIEWER_STDOUT_WORLD);
 40:   PCCreate(PETSC_COMM_WORLD,&pc);
 41:   PCSetFromOptions(pc);
 42:   PCSetOperators(pc,C,C);
 43:   PCSetUp(pc);
 44:   PCFactorGetMatrix(pc,&A);
 45:   MatView(A,PETSC_VIEWER_STDOUT_WORLD);

 47:   PCDestroy(&pc);
 48:   VecDestroy(&xtmp);
 49:   MatDestroy(&C);

 51:   PetscFinalize();
 52:   return 0;
 53: }