import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

class Student{
	String name ,id ;
	Double score ;
}


public class Main {

	public static void main(String[] args) {

		String pathOfFile = "/home/geek/Desktop/StudentExam.txt" ; //สร้างไฟล์ ขึ้นมา ที่หน้าจอแล้ว แก้ Path ด้วยนะครัช
		String pathOfFile_f = "/home/geek/Desktop/StudentGradeF.txt";
		File file = null ;


		FileReader fileReader = null;
		BufferedReader bufferedReader = null;
		Student[] student = new Student[10];


		FileWriter fileWriter = null;
		BufferedWriter bufferedWriter = null;
		PrintWriter printWriter = null;


		String line ;
		int i = 0 ;

		try {
			file = new File(pathOfFile);
			fileReader = new FileReader(file);
			bufferedReader = new BufferedReader(fileReader);

			while ((line = bufferedReader.readLine())!=null ) {

				student[i] = new Student();
				String m[] = line.split("\t",3);
				student[i].id = m[0];
				student[i].name = m[1];
				student[i].score = Double.parseDouble(m[2]);
				i++;
			}

		} catch (IOException e) {
			e.printStackTrace();
		} finally {

			if (bufferedReader!=null) {
				try {
					bufferedReader.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

			try {
				file = new File(pathOfFile_f);
				fileWriter = new FileWriter(file);
				bufferedWriter = new BufferedWriter(fileWriter);
				printWriter = new PrintWriter(bufferedWriter);
			} catch (Exception e2) {
				// TODO: handle exception
			}

			for (int j = 0; j < student.length; j++) {
				System.out.println("=============");
				System.out.println("รหัส " + student[j].id);
				System.out.println("ชื่อ " + student[j].name);

				String grade = "";

				if (student[j].score > 80) {
					grade = "A";
				}else if (student[j].score > 70) {
					grade = "B";
				}else if (student[j].score > 60) {
					grade = "C";
				}else if (student[j].score > 50) {
					grade = "D";
				}else{
					grade = "F";


					try {
						printWriter.println(student[j].name);
					} catch (Exception e2) {
						e2.printStackTrace();
					}

				}



				System.out.println("ผลการทำสอบ " + grade);
			}

			try {
				if (printWriter!=null) {
					printWriter.close();
				}
			} catch (Exception e2) {
				// TODO: handle exception
			}


		}



	}

}