Question

can someone please help me with my homework question for java array

Instructions from your teacher. Below two-dimensional array representing the grades for student's (4) exams (5) taken for the course grades - {{75.20, 84.60, 72.50, 85.60, 78.00). {65.20, 99.70.82.00, 90.00. 89.00), {95.00, 89.10, 77.00. 69.40, 77.00), {95.20, 84.50, 74.50, 88.00.90.00} }; students - { "Mark", "Tom", "Susan", "Ray" }; Find each student's total grade and average grade. Print it (System.out) to the console/screen

Answer 1

public class Main
{
   public static void main(String[] args)
   {
   //2D array declaration and initialization
double grades[][] =
{
{75.20, 84.60, 72.50, 85.60, 78.00},
{65.20, 99.70, 82.00, 90.00, 89.00},
{95.00, 89.10, 77.00, 69.40, 77.00},
{95.20, 84.50, 74.50, 88.00, 90.00}
};
  
//1D array declaration and initialization
String students[] = {"Mark", "Tom", "Susan", "Ray"};
     
   for(int i=0; i<4; i++)
{
   double totalGrade = 0;
  
   //calculate the total grade
   for(int j=0; j<5; j++)
   {
   totalGrade = totalGrade + grades[i][j];
   }
  
   //calculate the average grade
   double avgGrade = totalGrade / 5;
  
   //display the result
   System.out.println("\n\nStudent Name: "+ students[i]);
   System.out.printf("Total grades: %.2f", totalGrade);
   System.out.printf("\nAverage grade: %.2f", avgGrade);
   }
   }
}

OUTPUT:

Student Name: Mark
Total grades: 395.90
Average grade: 79.18

Student Name: Tom
Total grades: 425.90
Average grade: 85.18

Student Name: Susan
Total grades: 407.50
Average grade: 81.50

Student Name: Ray
Total grades: 432.20
Average grade: 86.44