// Here we have converted our grades into objects.

// Reference: lesson 21.

#include <iostream.h>
#include <iomanip.h>

//////////////////////////////////////////////////////////////////////////
// Create a grade class:
class grade_object
{
private:
  float grade_value;
public:
  void input_grade(void);
  float get_grade(void);
  void evaluate_grade(void);
};

void grade_object::input_grade(void)
{
  cin >> grade_value;
  while (grade_value < 0. || grade_value > 10.)
    {
      cout << "Grades must be between 0 and 10. Please reenter: ";
      cin >> grade_value;
    }
}

float grade_object::get_grade(void)
{
  return grade_value;
}

void grade_object::evaluate_grade(void)
{
  if (grade_value > 7) cout << " Good work!";
}
/////////////////////////////////////////////////////////////////////////

void main(void)
{
  grade_object grade_array[100]; // Create an array of grade objects.
  int student;                   // the student number or index.
  int number_of_students;        // the total number of students to handle

  // input the number of students:
  cout << "Number of students: ";
  cin >> number_of_students;

  // input the grades:
  for (student=0; student<number_of_students; student++)
    {
      cout << "Grade for student " << student << ": ";
      grade_array[student].input_grade();
    }
  cout << endl;

  // see what are the good students
  for (student=0; student<number_of_students; student++)
    {
      cout << "Student " << student << " has grade "
	   << setw(2) << grade_array[student].get_grade() << ".";
      grade_array[student].evaluate_grade();
      cout << endl;
    }
}