import java.util.Scanner;
import java.util.HashMap;

public class TranslateLetterGrade
{
   public static void main (String[] args)
   {

   System.out.println("Exercise P3.1 TranslateLetterGrade - by Matthew ");

   // Initializes hashmap
   HashMap grades = new HashMap();

   grades.put("A", 4);
   grades.put("B", 3);
   grades.put("C", 2);
   grades.put("D", 1);
   grades.put("F", 0);

   // Sets up scanner for input
   Scanner input = new Scanner(System.in);

   // Asks user to input letter grade
   System.out.println("Enter a letter grade: ");
   String grade = input.next().toUpperCase();
   String realGrade = grade.substring(0 , 1);
   System.out.println(grade);

   if (grades.containsKey(realGrade)) { // Checks if grade is contained in the HashMap
      if (realGrade.equals("A")) { // If grade inputted is A
         if (!grade.contains("-")) {
            System.out.println("The numeric value is: 4.0");
         } else if (grade.contains("-")) {
            System.out.println("The numeric value is: 3.7");
         }
      } else if (realGrade.equals("B")) { // If grade inputted is B
         if (!grade.contains("-") && !grade.contains("+")) {
            System.out.println("The numeric value is: 3.0");
         } else if (grade.contains("+") && !grade.contains("-")) {
            System.out.println("The numeric value is: 3.3");
         } else if (grade.contains("-") && !grade.contains("+")) {
            System.out.println("The numeric value is 2.7");
         }
      } else if (realGrade.equals("C")) { // If grade inputted is C
         if (!grade.contains("-") && !grade.contains("+")) {
            System.out.println("The numeric value is: 2.0");
         } else if (grade.contains("+") && !grade.contains("-")) {
            System.out.println("The numeric value is: 2.3");
         } else if (grade.contains("-") && !grade.contains("+")) {
            System.out.println("The numeric value is: 1.7");
         }

        } else if (realGrade.equals("D")) { // If grade inputted is D
         if (!grade.contains("-") && !grade.contains("+")) {
            System.out.println("The numeric value is: 1.0");
         } else if (grade.contains("+") && !grade.contains("-")) {
            System.out.println("The numeric value is: 1.3");
         } else if (grade.contains("-") && !grade.contains("+")) {
            System.out.println("The numeric value is: 0.7");
         }

        } else if (realGrade.equals("F")) { // If grade inputted is F
            System.out.println("The numeric value is: 0.0");
         }

   } else { // If grade is not contained in HashMap, print this.
      System.out.println(grade + " is not a grade.");
   }
   }
}