#include <iostream>
#include <vector>

using namespace std;

template<typename T>
class Set
{
public:
    class Iterator;
    void add(T v);
    void remove(T v);
    Iterator begin();
    Iterator end();

private:
    vector<T> data;
};

template <class T>
Set<T> addstuff()
{
    Set<T> a;
    a.add(1);
    a.add(2);
    a.add(3);
    a.add("a string");

    return a;
}

void main()
{
    addstuff<Set>(); //<< Error here. If I use addstuff<int>(), it would run but
                     //I can't add string to it. I am required to be able to add
                     //different data types to this vector
}