#include<iostream>
#include<string>
#include<cstdlib>    /* for random number generation */
using namespace std;  

class student
{
protected:
  string name;
  int year;  // 0=freshman, 1=sophomore, etc  4 = grad student
  int id;
  double gpa;
public:
  student(string n) // constructor
  {
    name = n;
    year = rand()%5;
    id = 700 + rand()%3000000;
    gpa = (rand()%401)/100.0;
  }
  ~student() {} // destructor
  string getname()  // accessor
  { return name; }
  void setyear(int y)
  { if (y>=0 && y<5)  year =y; } // modifier
  
  virtual void printinfo()  // virtual means overridable
  {
    cout << name + " is a ";
    string Y[] = {"freshman","sophomore","junior","senior","graduate student"};
    cout << Y[year] << " with a GPA of " << gpa << endl;
  }
  // separate computation from IO
};

void fs(student s)
{
  s.setyear(3);
}
void gs(student *s)
{
  s->setyear(3);
}

int main(int argc, char* argv[])
{
  student s1("Ian");
  student* s2 = new student("Alex");  // only form allowed in Java, but no *
  // what's the difference?
  s1.setyear(1); 
  s1.printinfo();
  s2->setyear(2);
  s2->printinfo();
  fs(s1);
  s1.printinfo();
  gs(s2);
  s2->printinfo();
  return 0;
}//main