Re: overload or inherit

I would like to merge two class which have got 90% of same
source code. But I don't know what to do.

class A {
  int putLightOn () {
    switch(status)
    {
      case iAmOff :
        print "I am off" ;
        print "put me on!!!\n" ;
    }
  }
}

class B {
  int putLightOn () {
    switch(status)
    {
      case iAmOff :
        print "I am off" ;
        print "and I am a red light" ; <<<< the only difference
between A and B
        print "put me on!!!\n" ;
    }
  }
}

I would like that B inherit from A but I don't know how re
writing B's putLightOn function