Structure Values

Members of structures are accessed using the form
```
     structure_name.variable_name
    
```
and can be operated on just like a variable of the appropriate type

The previous initialization could also be written as

      struct particle_type neutron;
      neutron.pos[0] = 1.1;
      neutron.pos[1] = 2.2;
      neutron.pos[2] = 3.3;
      neutron.mass = 14.2;
      neutron.type = 1;
      strcpy ( neutron.name, "neutron" );

and the data accessed via

      printf ( "Position of %s: %f, %f, %f\n", neutron.name,
               neutron.pos[0], neutron.pos[1], neutron.pos[2] );