Answer to Question #253384 in Java | JSP | JSF for chinni

Question

Consider an array MARKS[20][5] which stores the marks obtained by 20 students in 5 subjects. Now write a program to

(a) find the average marks obtained in each subject.

(b) find the average marks obtained by every student.

(c) display the scores obtained by every student and grades according to the average marks obtained by every student

Answer 1

SOLUTION CODE FOR THE ABOVE QUESTION




package com.company;
import java.util.Scanner;
public ​class Main {

   ​public static void main(String[] args) {
       ​Scanner sc = new Scanner(System.in);
       ​// menu for the program
       ​System.out.println("1. Find the average marks obtained in each subject.");
       ​System.out.println("2. Find the average marks obtained by every student.");
       ​System.out.println("3. Display the scores obtained by every student \n" +
               ​"and grades according to the average marks obtained by every student");
       ​System.out.println("4. Exit program");
       ​System.out.print("Enter the operation you want to perform: ");
       ​int option = sc.nextInt();
       ​//Populated array called MARKS for functionality testing
       ​int[][] MARKS  = {
               ​{80, 98, 75, 58,95},
               ​{52, 38, 64, 36,28},
               ​{58, 56, 82, 92,46},
               ​{46, 16, 12, 50,24},
               ​{88, 38, 81, 54,46},
               ​{50, 54, 62, 66,52},
               ​{94, 96, 98, 86,84},
               ​{60, 16, 62, 14,52},
               ​{95, 90, 94, 66,82},
               ​{90, 42, 85, 87,65},
               ​{82, 94, 75, 82,96},
               ​{98, 38, 64, 36,32},
               ​{94, 56, 82, 92,48},
               ​{78, 58, 68, 74,44},
               ​{52, 16, 34, 10,26},
               ​{76, 88, 72, 58,46},
               ​{70, 96, 98, 82,76},
               ​{84, 26, 62, 22,34},
               ​{92, 90, 88, 76,82},
               ​{78, 42, 71, 83,65}
       ​};
       ​if(option==1)
       ​{
           ​for(int i = 0; i<5;i++)
           ​{
               ​int subject_total = 0;
               ​for(int j = 0; j< 20; j++)
               ​{
                   ​subject_total = subject_total + MARKS[j][i];
               ​}
               ​System.out.println("The average mark for Subject "+(i+1)+" = "+(subject_total/20));
           ​}
       ​}
       ​else if(option==2)
       ​{
           ​for(int i = 0; i<20;i++)
           ​{
               ​int student_total_marks = 0;
               ​for(int j = 0; j<5; j++)
               ​{
                   ​student_total_marks = student_total_marks + MARKS[i][j];
               ​}
               ​System.out.println("Average mark for student "+(i+1)+" = "+(student_total_marks/5));
           ​}
       ​}
       ​else if(option==3)
       ​{
           ​for(int i = 0; i<20;i++)
           ​{
               ​int student_total_marks = 0;
               ​System.out.println("Student "+(i+1)+" scores:");
               ​for(int j = 0; j<5; j++)
               ​{
                   ​System.out.print("Subject "+(j+1)+" = "+MARKS[i][j]+", ");
                   ​student_total_marks = student_total_marks + MARKS[i][j];
               ​}
               ​float average = student_total_marks/5;
               ​System.out.print("Average: "+average);
               ​//Determine the grade based on the following criteria
               ​if(average > 69 & average < 100)
               ​{
                   ​System.out.println("Grade A");
               ​}
               ​else if(average > 59 & average < 70)
               ​{
                   ​System.out.println("Grade B");
               ​}
               ​else if(average > 49 & average < 60)
               ​{
                   ​System.out.println("Grade C");
               ​}
               ​else if(average > 39 & average < 50)
               ​{
                   ​System.out.println("Grade D");
               ​}
               ​else
               ​{
                   ​System.out.println(" Grade E");
               ​}
               ​System.out.println("");
           ​}
       ​}
       ​else if(option==4)
       ​{
           ​System.out.println("Program exited successfully");
       ​}
       ​else{
           ​System.out.println("Invalid option please try again");
       ​}
   ​}
   ​
}

SAMPLE PROGRAM OUTPUTS