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Grades.java

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import java.util.*;

import java.io.*;

import java.lang.*;

class Student {

String name, regNo;

long mobile;

String email, proctor_name;

Student(String name, String regNo, long mobile, String email, String proctor_name) {

this.name = name;

this.regNo = regNo;

this.mobile = mobile;

this.email = email;

this.proctor_name = proctor_name;

}

}

class Marks extends Student {

double cat1;

double cat2;

double da1;

double quiz1;

double quiz2;

double fat;

Marks(String name, String regNo, long mobile, String email, String proctor_name, double cat1, double cat2, double quiz1, double quiz2, double da1, double fat) {

super(name, regNo, mobile, email, proctor_name);

this.cat1 = cat1;

this.cat2 = cat2;

this.quiz1 = quiz1;

this.quiz2 = quiz2;

this.da1 = da1;

this.fat = fat;

}

}

class Result extends Marks {

double total;

Result(String name, String regNo, long mobile, String email, String proctor_name, double cat1, double cat2, double quiz1, double quiz2, double da1, double fat) {

super(name, regNo, mobile, email, proctor_name, cat1, cat2, quiz1, quiz2, da1, fat);

this.total = (cat1/50)*15 + (cat2/50)*15 + quiz1 + quiz2 + da1 + (fat/100)*40;

}

static double calcAvg(Result[] arr) {

double sum = 0, avg = 0;

for(Result r: arr) {

sum += r.total;

}

avg = sum / arr.length;

return avg;

}

static double calcSD(Result[] arr) {

double sum = 0, sd;

double u = calcAvg(arr);

for(Result r: arr) {

sum += Math.pow((r.total - u), 2);

}

sd = Math.sqrt(sum / arr.length);

return sd;

}

void display(String grade) {

System.out.println("\nResult of Student " + this.name + " (" + this.regNo + "): ");

System.out.println("Mobile Number: " + this.mobile);

System.out.println("Email: " + this.email);

System.out.println("Proctor Name: " + this.proctor_name);

System.out.println("TOTAL MARKS OBTAINED: " + this.total);

System.out.println("GRADE: " + grade);

}

}

public class Grades {

public static void main(String[] args) {

System.out.println("---------------------------------");

System.out.println("|\tVIT GRADING SYSTEM\t|");

System.out.println("---------------------------------");

Scanner sc = new Scanner(System.in);

System.out.print("Enter the number of students in the class: ");

int n = sc.nextInt();

int i;

String name, regNo, email, proctor_name;

long mobile;

double cat1, cat2, quiz1, quiz2, da1, fat;

Result[] slot = new Result[n];

for(i=0;i<n;i++)

{

System.out.println("\nEnter Student Details: ");

System.out.print("Enter Name: ");

name = sc.next() + sc.nextLine();

System.out.print("Enter Register Number: ");

regNo = sc.next();

System.out.print("Enter Mobile: ");

mobile = sc.nextLong();

System.out.print("Enter EMail: ");

email = sc.next();

sc.nextLine();

System.out.print("Enter Proctor Name: ");

proctor_name = sc.nextLine();

System.out.println("Mark Entry: ");

System.out.print("CAT1 (out of 50): ");

cat1 = sc.nextDouble();

System.out.print("CAT2 (out of 50): ");

cat2 = sc.nextDouble();

System.out.print("Digital Assignment: ");

da1 = sc.nextDouble();

System.out.print("Quiz 1: ");

quiz1 = sc.nextDouble();

System.out.print("Quiz 2: ");

quiz2 = sc.nextDouble();

System.out.print("Final Assessment Test (out of 100): ");

fat = sc.nextDouble();

slot[i] = new Result(name, regNo, mobile, email, proctor_name, cat1, cat2, quiz1, quiz2, da1, fat);

}

double avg = Result.calcAvg(slot);

avg = Math.round(avg*100)/100.0;

double sd = Result.calcSD(slot);

sd = Math.round(sd*100)/100.0;

System.out.println("\nCLASS RESULT");

System.out.println("Total number of students: " + slot.length);

System.out.println("Class Average: " + avg);

System.out.println("SD: " + sd);

for(Result r: slot) {

if(r.total >= avg + 1.5*sd) {

r.display("S");

}

else if(r.total >= avg + 0.5*sd) {

r.display("A");

}

else if(r.total >= avg - 0.5*sd) {

r.display("B");

}

else if(r.total >= avg - 1*sd) {

r.display("C");

}

else if(r.total >= avg - 1.5*sd) {

r.display("D");

}

else if(r.total >= avg - 2*sd) {

r.display("E");

}

else {

r.display("F");

}

}

}

}