Question

public class StudentADT { //1. A Student class should include data attributes including a // student’s name (first, and last), a student number, //an array of 3 assignment grades, and an exam grade. private String firstName; private String lastName; private int studentNumber; private double[] assignmentGrades; private double examGrade; //the constructor StudentADT(firstNm, lastNm, stNo, asn1Grade, asn2Grade, asn3Grade, examGrade) public StudentADT(String firstNm, String lastNm, int stNo, double asn1Grade, double asn2Grade, double asn3Grade, double examGrade) { firstName = firstNm; lastName = lastNm; studentNumber = stNo; assignmentGrades = new double[3]; assignmentGrades[0] = asn1Grade; assignmentGrades[1] = asn2Grade; assignmentGrades[2] = asn3Grade; this.examGrade = examGrade; } //displayStudentRecord() – displays the student record on the console void displayStudentRecord() { System.out.println("Student Name: " + firstName + " " + lastName); System.out.println("Student Number: " + studentNumber); System.out.println("Assignment Grades -"); System.out.println("Assignment Grade 1: " + assignmentGrades[0]); System.out.println("Assignment Grade 2: " + assignmentGrades[1]); System.out.println("Assignment Grade 3: " + assignmentGrades[2]); System.out.println("Exam Grade: " + examGrade); } //changeAssignmentGradeForStudent (asnNum, grade) – adds a given number // grade to the grade of a given assignment number asnNum void changeAssignmentGradeForStudent(int asnNum, double grade) { if (asnNum == 1) { assignmentGrades[0] = grade; } else if (asnNum == 2) { assignmentGrades[1] = grade; } else if (asnNum == 3) { assignmentGrades[2] = grade; } else { System.out.println("Incorrect Assignment Number entered"); } } //changeExamGradeForStudent(grade) – adds a given number grade to the final // exam grade void changeExamGradeForStudent(double grade){ this.examGrade=grade; } } _________________________________________________________________________________________ //Exercise 2 A Student ADT test application (10 pts) public class StudentADTTester { public static void main(String[] args) { //Your algorithm creates at least one student record. StudentADT studentADT = new StudentADT("Jacob","Moses",4, 89,87,92,95); //Your algorithm calls each function at least once. studentADT.displayStudentRecord(); studentADT.changeAssignmentGradeForStudent(2,99); studentADT.changeExamGradeForStudent(98); //Your algorithm would present evidence that your // functions are working correctly or not. System.out.println("Student Name should print Jacob Moses"); System.out.println("Student Number should print 4"); System.out.println("Assignment 1 should print 89"); System.out.println("Assignment 2 should print 99 instead of 87"); System.out.println("Assignment 3 should print 92-"); System.out.println("Exam Grade should print 98 instead of 95"); studentADT.displayStudentRecord(); } }\

Answer 1

I have corrected the syntax error and ran the program, refer the screenshot for the output

___________________________________________________________________________________________________

public class StudentADT {
   // 1. A Student class should include data attributes including a
   // student’s name (first, and last), a student number,
   // an array of 3 assignment grades, and an exam grade.
   private String firstName;
   private String lastName;
   private int studentNumber;
   private double[] assignmentGrades;
   private double examGrade;

   // the constructor StudentADT(firstNm, lastNm, stNo, asn1Grade,
   // asn2Grade,asn3Grade, examGrade)

   public StudentADT(String firstNm, String lastNm, int stNo, double asn1Grade, double asn2Grade, double asn3Grade,double examGrade) {
       firstName = firstNm;
       lastName = lastNm;
       studentNumber = stNo;
       assignmentGrades = new double[3];
       assignmentGrades[0] = asn1Grade;
       assignmentGrades[1] = asn2Grade;
       assignmentGrades[2] = asn3Grade;
       this.examGrade = examGrade;
   }

   // displayStudentRecord() – displays the student record on the console
   void displayStudentRecord() {
       System.out.println("Student Name : " + firstName + " " + lastName);
       System.out.println("Student Number: " + studentNumber);

       System.out.println("Assignment Grades -");
       System.out.println("Assignment Grade 1: " + assignmentGrades[0]);
       System.out.println("Assignment Grade 2: " + assignmentGrades[1]);
       System.out.println("Assignment Grade 3: " + assignmentGrades[2]);
       System.out.println("Exam Grade: " + examGrade);
   }

   // //changeAssignmentGradeForStudent (asnNum, grade) – adds a given number //
   // grade to the grade of a given assignment number asnNum
   void changeAssignmentGradeForStudent(int asnNum, double grade) {
       if (asnNum == 1) {
           assignmentGrades[0] = grade;
       } else if (asnNum == 2) {
           assignmentGrades[1] = grade;
       } else if (asnNum == 3) {
           assignmentGrades[2] = grade;
       } else {
           System.out.println("Incorrect Assignment Number entered");
       }
   }

   // //changeExamGradeForStudent(grade) – adds a given number grade to the final
   // // exam grade
   void changeExamGradeForStudent(double grade) {
       this.examGrade = grade;
   }
}
____________________________________________________________________________________________

public class StudentADTTester {

   public static void main(String[] args) {

       // Your algorithm creates at least one student record.
       StudentADT studentADT = new StudentADT("Jacob", "Moses", 4, 89, 87, 92, 95);
       // Your algorithm calls each function at least once.
       studentADT.displayStudentRecord();
       studentADT.changeAssignmentGradeForStudent(2, 99);
       studentADT.changeExamGradeForStudent(98);
       // Your algorithm would present evidence that your
       // functions are working correctly or not.
       System.out.println("Student Name should print Jacob Moses");
       System.out.println("Student Number should print 4");
       System.out.println("Assignment 1 should print 89");
       System.out.println("Assignment 2 should print 99 instead of 87");
       System.out.println("Assignment 3 should print 92");
       System.out.println("Exam Grade should print 98 instead of 95");
       studentADT.displayStudentRecord();
   }
}

______________________________________________________________________________________________

image screenshot