Question

(JAVA) Write a program that maintains student test scores in a two-dimesnional array, with the students identified by rows and test scores identified by columns. Ask the user for the number of students and for the number of tests (which will be the size of the two-dimensional array). Populate the array with user input (with numbers in {0, 100} for test scores). Assume that a score >= 60 is a pass for the below.
Then, write methods for:

Computing the number of tests that each student passed

Computing the number of students passed for each test

The methods should accept a two-dimensional array as one argument and a specific student number (for (a)) or a specific test number (for (b)) as the other argument. The methods should return the relevant counts.
Call the above methods (from main) by passing the two-dimensional array that contains the test scores, for each student (for (a)) and then for each test (for (b)). Print the counts.

Answer 1

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Please enter number of students:");
int noOfStudents = input.nextInt();
System.out.print("Please enter number of Tests:");
int noOfTests = input.nextInt();
int[][] testScoresOfStudents = new int[noOfStudents][noOfTests];
for(int nS = 0;nS<noOfStudents;nS++) {
System.out.println("\nTest scores of student"+nS+" :" );
for(int nT= 0 ; nT<noOfTests;nT++) {
   System.out.print("Test "+nT+" score:" );
   testScoresOfStudents[nS][nT] = input.nextInt();
}
}
System.out.println("Tests passed by student 0:"+testsPassedByAStudent(testScoresOfStudents,0));
System.out.println("No of students passed Test 0:"+studentsPassedAParticularTest(testScoresOfStudents,0));
}
public static int testsPassedByAStudent(int[][] testScoresOfStudents,int studentId ) {
   int count = 0;
   for(int i = 0;i<testScoresOfStudents[studentId].length;i++) {
       if(testScoresOfStudents[studentId][i]>=60)
           ++count;
   }
   return count;
}
public static int studentsPassedAParticularTest(int[][] testScoresOfStudents,int testId ) {
   int count = 0;
   for(int i = 0;i<testScoresOfStudents.length;i++) {
       if(testScoresOfStudents[i][testId]>=60)
           ++count;
   }
   return count;
}
}