// Student.cpp

#include <vector>
#include <string>
#include <iostream>
using namespace std;

#include "Student.h"

// initialization of string or vector objects occurs automatically.
//   But this is not true of int, double, etc.
Student::Student() : rin_( 0 ), gpa_( 0.0 ), grades_sum_( 0.0 ) { }

Student::Student( const string& first_name, const string& last_name, int rin )
 : first_name_( first_name ), last_name_( last_name ), rin_( rin ),
   gpa_( 0.0 ), grades_sum_( 0.0 )
{ }

void Student::add_grade( double grade )
{
 grades_.push_back( grade );

 // recalculate the average
 grades_sum_ += grade;
 gpa_ = grades_sum_ / grades_.size();
}

ostream& operator<< ( ostream& os, const Student& s )
{
 os << s.get_last_name() << ", " << s.get_first_name();
 return os;
}