class PeopleFilterC
{
// A version of PeopleFilter with a constructive filter method

PersonChoose myChoose;

 public PeopleFilterC(PersonChoose chooser)
 {
  myChoose=chooser;
 }

 public Person[] filter(Person [] a,int n)
 {
  Person [] temp,b;
  int count=0;
  temp = new Person[n];
  for(int i=0;i<n;i++)
     if(myChoose.choose(a[i]))
        temp[count++]=a[i];
  b = new Person[count];
  for(int i=0;i<count;i++)
     b[i]=temp[i];
  return b;
 }

}