void bagTester()
{
LinkedBag<string> bag;
cout << "Testing the Link-Based Bag:" << endl;
cout << "isEmpty: returns " << bag.isEmpty() << "; should be 1 (true)" << endl;
cout << bag;
string numbers[] = { "one", "two", "three", "four", "five", "one" };
cout << "Add 6 items to the bag: " << endl;
for (int i = 0; i < sizeof(numbers)/sizeof(numbers[0]); i++)
{
bag.add(numbers[i]);
} // end for
cout << bag;
cout << "isEmpty: returns " << boolalpha << bag.isEmpty() << "; should be 0 (false)" << endl;
cout << "getCurrentSize: returns " << bag.getCurrentSize() << "; should be 6" << endl;
cout << "Try to add another entry: add(\"extra\") returns " << bag.add(string("extra")) << endl;
cout << "contains(\"three\"): returns " << boolalpha << bag.contains(string("three")) << "; should be 1 (true)" << endl;
cout << "contains(\"ten\"): returns " << bag.contains(string("ten")) << "; should be 0 (false)" << endl;
cout << "getFrequencyOf(\"one\"): returns " << bag.getFrequencyOf(string("one")) << " should be 2" << endl;
cout << "remove(\"one\"): returns " << boolalpha << bag.remove(string("one")) << "; should be 1 (true)" << endl;
cout << "getFrequencyOf(\"one\"): returns " << bag.getFrequencyOf(string("one")) << " should be 1" << endl;
cout << "remove(\"one\"): returns " << boolalpha << bag.remove(string("one")) << "; should be 1 (true)" << endl;
cout << "remove(\"one\"): returns " << boolalpha << bag.remove(string("one")) << "; should be 0 (false)" << endl;
cout << endl;
cout << bag;
cout << "After clearing the bag, ";
bag.clear();
cout << "isEmpty: returns " << bag.isEmpty() << "; should be 1 (true)" << endl;
} // end bagTester
BagInterface<ItemType>* LinkedBag<ItemType>::intersection(const BagInterface<ItemType> &otherBag) const
{
// create a new bag to return
LinkedBag<ItemType>* newBag = new LinkedBag<ItemType>();
int lcv;
// create a temp copy of the current bag
vector<ItemType> myVec = (*this).toVector();
LinkedBag<ItemType> myBagCopy;
for (lcv = 0; lcv < myVec.size(); lcv ++)
{
myBagCopy.add(myVec[lcv]);
}
// create a temp copy of the argument bag
vector<ItemType> otherBagVec = otherBag.toVector();
LinkedBag<ItemType> otherBagCopy;
for (lcv = 0; lcv < otherBagVec.size(); lcv ++)
{
otherBagCopy.add(otherBagVec[lcv]);
}
// compare and add to the return bag
for (lcv = 0; lcv < myVec.size(); lcv ++)
if (myBagCopy.contains(myVec[lcv]) && otherBagCopy.contains(myVec[lcv]))
{
newBag->add(myVec[lcv]);
myBagCopy.remove(myVec[lcv]);
otherBagCopy.remove(myVec[lcv]);
}
return newBag;
}
BagInterface<ItemType>* LinkedBag<ItemType>::difference(const BagInterface<ItemType> &otherBag) const
{
int lcv;
vector<ItemType> myVec = (*this).toVector();
vector<ItemType> otherVec = otherBag.toVector();
LinkedBag<ItemType>* newBag = new LinkedBag<ItemType>();
for ( lcv = 0; lcv < myVec.size(); lcv ++ )
{
newBag->add(myVec[lcv]);
}
for (lcv = 0; lcv < otherVec.size(); lcv ++ )
{
newBag->remove(otherVec[lcv]);
}
return newBag;
}