//-----------------------------------------------------------------
//
// templates2.cpp
//
// Illustrating basic things about template classes
// 
// written by: Simon Parsons
// modified  : 19th May 2010
//
//-----------------------------------------------------------------

#include <iostream>
using namespace std;

// Template class definition

template<class T>
class aPair{
private:
  T values[2];

public:
  aPair(T first, T second){
    values[0] = first;
    values[1] = second;
  }

  T getFirst(){
    return values[0];
  }

  T getSecond();
};

// External function definition

template<class T>
T aPair<T>::getSecond(){
    return values[1];
  }

// A template specialization --- if the pair is a pair of chars, then
// we can print it.
//
// Note that we have to define all the bits that we want for the class, they
// aren't inherited from the generic class

template<>
class aPair <char>{
private: 
  char values[2];
public:
  aPair(char first, char second);

  void print(){
    cout << values[0] << values [1] << endl;
  }
};


// External function definition

aPair<char>::aPair(char first, char second){
    values[0] = first;
    values[1] = second;
  }

main(){
  
  aPair<int> p(1, 2);
  cout << p.getSecond() << endl;

  aPair<double> q(1.1, 2.2);
  cout << q.getFirst() << endl;
  // q.print(); This line won't compile

  aPair<char> r('h', 'i');
  r.print();
}