I used this for my string class. You can easily change it to make it work for your Instructor class.
Code:
//In your .h file
friend	ostream&	operator<<(ostream&,const String&);
friend	istream&	operator>>(istream&,String&);

//In your .cpp file
ostream& operator<<(ostream& o, const String& newStr)
{
	return o << newStr.lpzstr;
}

istream& operator>>(istream& i,String& obj)
{
	char buffer[1024];
	i.getline(buffer,1023,'\n');
	delete [] obj.lpzstr;
	obj.lpzstr = new char[strlen(buffer)+1];
	strcpy(obj.lpzstr, buffer);
	return i;
}