IntegerSet IntegerSet::set_difference(const IntegerSet& o){
IntegerSet out;
// for(int i = 0; i < o.num_elements; i++){
// if(!contains(o.elements[i])){
// out.add(o.elements[i]);
// }
// }
for(int i = 0; i < num_elements; i++){
if(!o.contains(elements[i])){
out.add(elements[i]);
}
}
return out;
}
int main(){
IntegerSet s1,s2;
s1.add(1); s1.add(5); s1.add(10); s1.add(15); s1.add(100);
s2.add(2); s2.add(5); s2.add(15); s2.add(50); s2.add(90);
IntegerSet q;
q = s1.set_union(s2);
cout << q.contains(1) << q.contains(2) << q.contains(5) << q.contains(15)
<< q.contains(50) << q.contains(100) << q.contains(200) << endl;
q = s1.set_difference(s2);
cout << q.contains(1) << q.contains(2) << q.contains(5) << q.contains(15)
<< q.contains(50) << q.contains(100) << q.contains(200) << endl;
}
