writing to a file (problem with file << )

Code:

#include <iostream> #include <fstream> //allow writing to file instead of cout #include <cstring> using namespace std; #include "date.h" #include "person.h" #include "student.h" #include "Employee.h" #include "setT.h" void main() { ofstream file ("test_output.txt"); //file for test results file << "Program Output" << "\n"; //write title for test Person *p1 = new Person("Lou", "[email protected]", 20, 6, 1960); Set<Person> s,s2,s3; Set<int> setints; Set<Date> dates; s.add(*p1); if (p1 != &(s.someElement())) cout << "OBJECTS ARE NOT THE SAME\n"; //should not happen s.add(*p1); //attempt to add a duplicate s.add(*(new Person("Frank", "[email protected]", 20, 3, 1967))); s.add(*(new Person("Dave", "[email protected]", 21, 12, 1961))); s.add(*(new Student("Eric", "[email protected]", Date(25, 4, 1958), "Carleton", 12345 ))); s.add(*(new Student("Mary", "[email protected]", Date(25, 4, 1955), "Carleton", 22234 ))); s.add(*(new Employee("John", "johnchat.ca", Date(12, 12, 1970), "Nortel", 99912 ))); int a = 5; int b = 12; int c = 12; int d = 42; setints.add(a).add(b).add(c).add(d).add(a); //note attempt to add a duplicate file << setints; //print the ints //file << "Printing the Set<int> \n"; //write comment to output file //file << setints; //print the ints to file //print the names using the iterator. for (s.reset(); s.hasMore(); s.advance() ) cout << s.element().getName() << " "; //add some more people s.add(*(new Person("Alan", "[email protected]", 20, 3, 1967))); s.add(*(new Person("Eric", "[email protected]", 25, 4, 1958))); s.add(*(new Person("Bruce", "[email protected]", 25, 4, 1955))); //print out the three sets //file << s << "\n" << s2 << "\n" << s3 << "\n"; //Delete all the heap objects (they should all be in set s and dates cout << endl; for (s.reset(); s.hasMore(); s.advance() ) { cout << "Deleting " << (s.element()) << endl; delete &(s.element()); } for (dates.reset(); dates.hasMore(); dates.advance() ) { delete &(dates.element()); cout << "test2\n"; } file.close(); //close output file cin.get(); } //end main

I've had to comment out anything that has to do with file << in my assignment. I get an error saying:

binary '<<' : no operator found which takes a right-hand operand of type 'Set<T>' (or there is no acceptable conversion).

Can anybody tell me what's wrong with this...here is my set class

Code:

template <class T> class Set { public: Set(int initial_size = 4):index(0),numberOfElements(0) { capacity = initial_size; elements = new T*[capacity]; for (int i = 0; i < capacity; i++) elements[i] = NULL; } Set(const Set<T> & s) { capacity = s.capacity; elements = new T*[capacity]; for (int = 0; i<capacity; i++) elements[i] = s.elements[i]; } ~Set(void){delete [] elements;} //destructor Set<T> & operator=(const Set<T> & s) { if (&s != this) { capacity = s.capacity; elements = new T*[capacity]; for (int = 0; i<capacity; i++) elements[i] = s.elements[i]; } return *this; } Set<T> & add(T & element) { if ((index == capacity)) { std::cout << endl << "Container is growing." << endl << endl; T ** temp = elements; elements = new T*[capacity*2]; for(int i=0; i<index; i++) elements[i] = temp[i]; capacity *= 2; delete [] temp; } for(int i = 0; i < capacity; i++) if ((elements[i] != &element) && index < capacity) {elements[index] = &element; index++; numberOfElements++; cout << element << " added" << endl; break;} else {cout << endl << "Cannot add duplicate element." << endl << endl; break;} return *this; } Set<T> & remove(const T & element) { if(size() < capacity/4) { //Shrinks the container when 1/4 full std::cout << "Container is shrinking.\n"; elements = new t*[capacity/2]; for(int i=0; i<index; i++) elements[i] = temp[i]; capacity = capacity/2; delete [] temp; } } // remove object equal to element if it exists T & someElement() const { index = 0; return *elements[index++]; } //answer some (any) element of the set but don't remove it //Iterator Methods void reset() const {index = 0;} bool hasMore() const {return index < numberOfElements;} void advance() const {index++;} T & element()const {return *elements[index];} int size()const {return numberOfElements;} //answer the number of elements in the set. void printOn(ostream & ostr){ostr << "hey";} //print the elements of the set private: T ** elements; //to store elements (like assignment #1) int numberOfElements; //number of elements in the set int capacity; //max. no of elements the set can current memory can hold mutable int index; //private variable used for the iteration };