Question

IN JAVA WITH COMMENTS, The assignment: This program inputs the names of 5 students and the (integer) grades they earned in 3 tests. It then outputs the average grade for each student. It also outputs the highest grade a student earned in each test, and the average of all grades in each test.

Your output should look like this:

Mary's average grade was 78.8%

Harry's average grade was 67.7%

etc... :

In test 1 the highest grade was 93% and the average was 89.2%

In test 2........etc

Your main method should be modular.

Write a method that inputs the 5 names into an array (one dimensional), and returns this array to main

Write a method that inputs the 15 (integer) test grades into a (two-dimensional) array, and returns this array to main.

Write a method that calculates the students averages and stores them in an array , and returns this array to main

Write a method that calculates the average grade for each test and stores them in an array, and returns this array to main

Write a method that determines the highest grade for each test and stores this in an array , and returns this array to main. MAIN will print all the information. The printing could be done easily by the methods instead of having to store the information in an array, but this will give you practice in arrays and methods - all useful for the final exam.

Thanks a lot, please include the comments.

Answer 1

output:

code:

import java.util.*;
public class Main
{   
public static String[] name_i() /*this function will take student name from user and return array of student name*/
{
String[] name=new String[5]; /*here we make array of string*/
Scanner sc=new Scanner(System.in);
for(int i=0;i<5;i++)
{
System.out.print("Enter Student "+(i+1)+ " name:");
name[i]=sc.nextLine(); /*here we take Student name input*/
}
return name;
}
  
public static int[][] test_i(String name[]) /*this function will take student test mark from user and return test mark array*/
{
int[][] test=new int[5][3]; /*here we initialize 2D array for store student test mark*/
Scanner sc=new Scanner(System.in);
for(int i=0;i<5;i++)
{
for(int j=0;j<3;j++)
{
System.out.print("Enter Student "+name[i]+ " test "+(j+1)+" mark:");
test[i][j]=sc.nextInt(); /*here we take student test mark input*/
}
}
return test;
}
  
public static float[] student_a(int t_mark[][]) /*in this function we find the average of student mark and return array*/
{
float[] student_avg_mark=new float[5]; /*in this array we will store student_avg_mark*/
float sum=0;
for(int i=0;i<5;i++)
{ sum=0;
for(int j=0;j<3;j++)
{
sum=sum+t_mark[i][j]; /*here we do sum of student mark*/
}
student_avg_mark[i]=sum/3; /*than here we store sum into student_avg_mark array*/
}
return student_avg_mark; /*here we return student_avg_mark array*/
}
  
public static float[] test_a(int t_mark[][]) /*in this function we find the average of test mark and return array*/
{
float[] test_avg_mark=new float[3]; /*in this array we will store test_avg_mark*/
float sum=0;
for(int i=0;i<3;i++)
{   
sum=0;
for(int j=0;j<5;j++)
{
sum=sum+t_mark[j][i]; /*here we do sum of test mark*/
}
test_avg_mark[i]=sum/5; /*than here we store sum into test_avg_mark array*/
}
return test_avg_mark; /*here we return student_avg_mark array*/
}
  
public static int[] test_H(int t_mark[][]) /*in this function we find the test highest mark*/
{
int[] test_high_mark=new int[3]; /*in this array we will store test_highest_mark*/
int max=0;
for(int i=0;i<3;i++)
{ max=0; /*here we declare max variable with 0*/
for(int j=0;j<5;j++)
{
/*here we compare max with the test mark if condition getting true than we store that value into max*/
if(max<t_mark[j][i])
{
max=t_mark[j][i];   
}
}
test_high_mark[i]=max; /*after inner loop execute we store max into test_high_mark array*/
}
return test_high_mark; /*here we return test_high_mark array*/
}
  
   public static void main(String[] args)
   {   
   /*here we instialize 5 different types array for store value which is return from function*/
   String[] name=new String[5];
   int[][] test_mark=new int[5][3];
   float[] student_avg_mark=new float[5];
   float[] test_avg_mark=new float[3];
   int[] test_high_mark=new int[3];
   name=name_i(); /*here we call name_i function and store student name in name array*/
   test_mark=test_i(name); /*here we call test_i function and store test mark in test_mark array*/
   student_avg_mark=student_a(test_mark);/*here call student_a function and store student averagemark in student_avg_mark*/
   test_avg_mark=test_a(test_mark);/*here we call test_a function and store test average mark in test_avg_mark array*/
   test_high_mark=test_H(test_mark);/*here we call test_H function and store test highest mark in test_high_mark array*/
  
   for(int i=0;i<5;i++)
   {
   System.out.println(name[i]+" average grade was "+String.format("value is %.1f",student_avg_mark[i])+"%");
   }
   for(int i=0;i<3;i++)
   {
   System.out.println("In test "+(i+1)+" highest grade was "+test_high_mark[i]+"% and the average was "+
   String.format("value is %.1f",test_avg_mark[i])+"%");
   }
   }
}