2: static char help[] = "Tests PetscOptionsGetScalar(), PetscOptionsScalarArray() for complex numbers\n";

  4: #include <petscsys.h>

  8: int main(int argc,char **argv)
  9: {
 10:   PetscInt    ierr,n,i;
 11:   PetscScalar a,array[10];
 12:   PetscReal   rarray[10];

 14:   PetscInitialize(&argc,&argv,(char*)0,help);
 15:   PetscOptionsGetScalar(NULL,NULL,"-a",&a,NULL);
 16:   PetscPrintf(PETSC_COMM_SELF,"Scalar a = %g + %gi\n",(double)PetscRealPart(a),(double)PetscImaginaryPart(a));

 18:   PetscOptionsBegin(PETSC_COMM_WORLD,NULL,"test options",NULL);
 19:   n = 10; /* max num of input values */
 20:   PetscOptionsRealArray("-rarray", "Input a real array", "ex14.c", rarray, &n, NULL);
 21:   if (n) {
 22:     PetscPrintf(PETSC_COMM_SELF,"Real rarray of length %d\n",n);
 23:     for (i=0; i<n; i++){
 24:       PetscPrintf(PETSC_COMM_SELF," %g,\n",rarray[i]);
 25:     }
 26:   }

 28:   n = 10; /* max num of input values */
 29:   PetscOptionsScalarArray("-array", "Input a scalar array", "ex14.c", array, &n, NULL);
 30:   if (n) {
 31:     PetscPrintf(PETSC_COMM_SELF,"Scalar rarray of length %d\n",n);
 32:     for (i=0; i<n; i++){
 33:       if (PetscImaginaryPart(array[i]) < 0.0) {
 34:         PetscPrintf(PETSC_COMM_SELF," %g - %gi\n",(double)PetscRealPart(array[i]),(double)PetscAbsReal(PetscImaginaryPart(array[i])));
 35:       } else {
 36:         PetscPrintf(PETSC_COMM_SELF," %g + %gi\n",(double)PetscRealPart(array[i]),(double)PetscImaginaryPart(array[i]));
 37:       }
 38:     }
 39:   }
 40:   PetscOptionsEnd();
 41:   PetscFinalize();
 42:   return 0;
 43: }