import java.util.Scanner;
import java.io.*;
import java.text.DecimalFormat;

public class Grader
{
    public static void main (String[] args) throws IOException
    {
        System.out.println ("Exam Scoring...");
        System.out.println();
  
        String key, line, SA; //Answer key, Student ID and Student answers
        Scanner fileScan, lineScan, SAScan; //Scans text file and scans ID and response
        double score = 0, avg; //numerical grade and average
    double avgscore = 0; //running score
    int lineCount = 0; //counts number of lines
        DecimalFormat fmt = new DecimalFormat ("0.00");
        
        fileScan = new Scanner (new File ("C:\\Users\\Ibby\\Project2\\src\\Students.txt"));
        key = fileScan.next();  //Scans answer key
        
         while (fileScan.hasNext())
        {
         line = fileScan.next();
         lineScan = new Scanner (line);
         lineScan.useDelimiter("/");
         System.out.print ("" + lineScan.next());
        
         SA = lineScan.next();  //Scans students response
         SAScan = new Scanner (SA);
    
         lineCount++;
     avgscore += score;
     score = score - score;
        
         for (int i = 0; i < SA.length(); i++)
         {
         char response = SA.charAt(i);
             char correct = key.charAt(i);
              if (response == correct)
          score+=5;
          if (response != correct)
          score-=2;
     }
            
        
         System.out.print (" " + fmt.format(score) + " ");
        
             if (score <= 100.00 && score >=93.00)
             System.out.println ("A");        
             else if (score <=92.99 && score >=90.00)
             System.out.println ("A-");
             else if (score <= 89.99 && score >=87.00)
             System.out.println ("B+");
             else if (score <=86.99 && score >=83.00)
             System.out.println ("B");
             else if (score <=82.99 && score >= 80.00)
             System.out.println ("B-");
             else if (score <=79.99 && score >=77.00)
             System.out.println ("C+");
             else if (score <=76.99 && score >=73.00)
             System.out.println ("C");
             else if (score <=72.99 && score >=70.00)
             System.out.println ("C-");
             else if (score <=69.99 && score >=67.00)
             System.out.println ("D+");
             else if (score <=66.99 && score >=63.00)
             System.out.println ("D");
             else if (score <=62.99 && score >=60.00)
             System.out.println ("D-");
             else if (score <=59.99)
             System.out.println ("F");
    }
        
     System.out.println();
     avg = (avgscore + score)/lineCount;
     System.out.println ("Average Score: " + fmt.format(avg));
      

    }
}