:(

In file included from Queue.h:7:0,
                 from Queue.C:4:
Stack.h:30:49: warning: friend declaration ‘std::ostream& operator<<(std::ostream&, Stack<T>&)’ declares a non-template function [-Wnon-template-friend]
   friend ostream& operator<< (ostream&,Stack<T>&);
                                                 ^
Stack.h:30:49: note: (if this is not what you intended, make sure the function template has already been declared and add <> after the function name here)
In file included from Stack.C:5:0:
Stack.h:30:49: warning: friend declaration ‘std::ostream& operator<<(std::ostream&, Stack<T>&)’ declares a non-template function [-Wnon-template-friend]
   friend ostream& operator<< (ostream&,Stack<T>&);
                                                 ^
Stack.h:30:49: note: (if this is not what you intended, make sure the function template has already been declared and add <> after the function name here)
In file included from Queue.h:7:0,
                 from main.C:2:
Stack.h:30:49: warning: friend declaration ‘std::ostream& operator<<(std::ostream&, Stack<T>&)’ declares a non-template function [-Wnon-template-friend]
   friend ostream& operator<< (ostream&,Stack<T>&);
                                                 ^
Stack.h:30:49: note: (if this is not what you intended, make sure the function template has already been declared and add <> after the function name here)
g++ -static *.o -o main
main.o: In function `main':
main.C:(.text+0xd4): undefined reference to `operator<<(std::ostream&, Stack<int>&)'
collect2: error: ld returned 1 exit status
make: *** [main] Error 1