// package chapter5;

/**
 * Title:        Chapter 5, "Arrays"
 * Description:  Examples for Chapter 2
 * Copyright:    Copyright (c) 2000
 * Company:      Armstrong Atlantic State University
 * @author Y. Daniel Liang
 * @version 1.0
 */
// AssignGrade.java: Assign grade

public class AssignGrade
{
  /**Main method*/
  public static void main(String[] args)
  {
    int numOfStudents = 0; // The number of students
    int[] scores; // Array scores
    int best = 0; // The best score
    char grade; // The grade

    // Get number of students
    System.out.println("Please enter number of students");
    numOfStudents = MyInput.readInt();

    // Create array scores
    scores = new int[numOfStudents];

    // Read scores and find the best score
    System.out.println("Please enter " + numOfStudents + " scores");
    for (int i=0; i<scores.length; i++)
    {
      scores[i] = MyInput.readInt();
      if (scores[i] > best)
        best = scores[i];
    }

    // Assign and display grades
    for (int i=0; i<scores.length; i++)
    {
      if (scores[i] >= best - 10)
        grade = 'A';
      else if (scores[i] >= best - 20)
        grade = 'B';
      else if (scores[i] >= best - 30)
        grade = 'C';
      else if (scores[i] >= best - 40)
        grade = 'D';
      else
        grade = 'F';

      System.out.println("Student " + i + " score is " + scores[i] +
        " and grade is " + grade);
    }
  }
}

//-----------------

// a class for reading various types from the keyboard (System.in) 
class MyInput
{
    public static String readString()
    {
        String string = "";
        java.io.BufferedReader bufferedReader = 
           new java.io.BufferedReader(new java.io.InputStreamReader(System.in));
        try
        {
            string = bufferedReader.readLine();
        }
        catch (java.io.IOException ex)
        {
            throw new RuntimeException(ex);
        }
        return string;
    }

    public static int readInt()
    {
        return Integer.parseInt(readString());
    }

    public static double readDouble()
    {
        return Double.parseDouble(readString());
    }

    // test all the methods of this class
    public static void main(String[] args)
    {
        System.out.println("Testing 'readString()'");
        System.out.print("Input your string : ");
        System.out.println("Your string was '" + readString() + "'");
        System.out.println("\nTesting 'readInt()'");
        System.out.print("Input your int : ");
        System.out.println("Your int was '" + readInt() + "'");
        System.out.println("\nTesting 'readDouble()'");
        System.out.print("Input your double : ");
        System.out.println("Your double was '" + readDouble() + "'");
    }
}