Need code written for a java eclipse program that will follow the skeleton code. Exams and...

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Need code written for a java eclipse program that will follow the skeleton code.

Exams and assignments are weighted
You will design a Java grade calculator for this assignment. A user should be able to calculate her/his letter grade in COMS/

Your task: 1. Import/Copy-paste GradeCompute.java into Eclipse. 2. Read the skeleton code carefully and understand the functi

import java.util.Scanner ; This class computes a lettergrade for a user Takes user input of scores in all worksheets, assigne

- ASSIGNMENTS - // Inpot number of assignments System.out.print(Enter number of assignments: ); int nussignmnt - stdin.next

I Caleulate grade String grade computeGrade(wksheet ScoresArr, assignment Scores Arr,exanScoresArr, vksheet Total, assignmnt

You must do this everytime user enters an invalid value 4. When user inputs a valid value, store it in the scores[] array .@p

YOU NEED TO MODIFY THIS METHOD . This method is used to take user input and fill the array created in the main method that st

Need code written for a java eclipse program that will follow the skeleton code. Exams and...

You will design a Java grade calculator for this assignment. A user should be able to calculate her/his letter grade in COMS/MIS 207 by inputting their scores obtained on worksheets, assignments and exams into the program. A skeleton code named GradeCompute.java containing the main method and stubs for a few other methods, is provided to you. You must not modify/make changes to the main method at all. It should be left exactly same. You must not change the name, input parameters, return type of any method. Read and understand the skeleton code before you attempt to code the methods YOU MUST READ THE SKELETON CODE CAREFULLY. THIS DOCUMENT DOES NOT CONTAIN EVERY INSTRUCTION The program you write should be able to do the following 1. Take input from the user: worksheet, assignment and exam scores, and their respective maximum possible score (total points) To simplify matters, we will consider same maximum score for each category. For example, all worksheets are worth 20 points. Similarly, say all assignments are worth 50 points. You can change these numbers while testing your code The total number of exams is three, and each is worth 100. These are constant and declared in the main method of the skeleton code. You cannot change these. 2. Calculate the letter grade by using the grade calculation rules (provided below). 3. Display grade as a String to user. Rules/scale to calculate the grades: 1. If the obtained scores on worksheets and assignments combined is less than 50% of maximum possible score for worksheets and assignments combined, then the grade is F. 2. If the exam scores combined are less than 50% of maximum possible score for all three exams, then the grade is F. 3. Otherwise use the following scale: A: 90% B: >80% C: 70% D:60% F: <60% 4. Weightage of worksheet, assignment and exams: i. Worksheets and assignments are weighted at 40% ii. Exam 1: 15% . Exam 2: 20% iv. Exam 3: 25% Assume the user always inputs an integer number as scores for worksheets, assignments and exams. This means, you do not have to write code to check for the correct input type.

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Answer 1

Answer #1

/****************************************ComputeGrade.java*********************************/

import java.util.Scanner;

public class ComputeGrade {

public static void main(String[] args) {

final int NUM_EXAMS = 3;
final int MAX_SCORE_EXAM = 100;

Scanner stdin = new Scanner(System.in);

System.out.print("Enter number of worksheets: ");
int numWkSheet = stdin.nextInt();

System.out.print("Enter MAX possible score for each worksheet: ");
int maxScoreOfEachWksheet = stdin.nextInt();

int wksheetTotal = numWkSheet * maxScoreOfEachWksheet;

System.out.println("Total points on worksheets: " + wksheetTotal);

int[] wksheetScoresArr = new int[numWkSheet];

System.out.print("Enter number of assignments: ");
int numAssignment = stdin.nextInt();

System.out.print("Enter max possible score for each assignment: ");

int maxScoresOfEachAssignment = stdin.nextInt();

int assignmentTotal = numAssignment * maxScoreOfEachWksheet;

int[] assignmentScoresArr = new int[numAssignment];

int examTotal = NUM_EXAMS * MAX_SCORE_EXAM;

System.out.println("Total points on exams: " + examTotal);

int[] examScoresArr = new int[NUM_EXAMS];

readWkSheets(wksheetScoresArr, maxScoreOfEachWksheet, stdin);

       System.out.print("Score on worksheets: ");
       printArray(wksheetScoresArr);
       System.out.println();

readAssignments(assignmentScoresArr, maxScoresOfEachAssignment, stdin);

       System.out.print("Score on Assignments: ");
       printArray(assignmentScoresArr);
       System.out.println();
       readExams(examScoresArr, MAX_SCORE_EXAM, stdin);

System.out.print("Score on exams: ");

printArray(examScoresArr);

       System.out.println();
       String grade = computeGrade(wksheetScoresArr, assignmentScoresArr, examScoresArr, wksheetTotal, assignmentTotal,
               examTotal);

System.out.println("Grade is " + grade);

stdin.close();
}

public static int computeSum(int[] array) {

int total = 0;
for (int i = 0; i < array.length; i++) {

total += array[i];
}

return total;
}

public static void printArray(int[] array) {

for (int i = 0; i < array.length; i++) {

           System.out.print(array[i] + " ");
       }
   }

public static void readWkSheets(int[] scores, int maxScore, Scanner in) {

for (int i = 0; i < scores.length; i++) {

           System.out.print("Enter score in worksheet " + (i + 1) + ": ");
           scores[i] = in.nextInt();
           while (scores[i] > maxScore) {

               System.out.println("You must enter valid score!");
               System.out.print("Enter valid score: ");
               scores[i] = in.nextInt();
           }
       }
   }

public static void readAssignments(int[] scores, int maxScore, Scanner in) {

for (int i = 0; i < scores.length; i++) {

           System.out.print("Enter score in assignment " + (i + 1) + ": ");
           scores[i] = in.nextInt();
           while (scores[i] > maxScore) {

               System.out.println("You must enter valid score!");
               System.out.print("Enter valid score: ");
               scores[i] = in.nextInt();
           }
       }

}

public static void readExams(int[] scores, int maxScore, Scanner in) {

for (int i = 0; i < scores.length; i++) {

           System.out.print("Enter score in exam " + (i + 1) + ": ");
           scores[i] = in.nextInt();
           while (scores[i] > maxScore) {

               System.out.println("You must enter valid score!");
               System.out.print("Enter valid score: ");
               scores[i] = in.nextInt();
           }
       }
   }

public static String computeGrade(int[] wkSheetArr, int[] assignmentArr, int[] examArr, int wkSheetTot,
int assignmentTot, int examTot) {

       String grade = "";
       wkSheetTot = computeSum(wkSheetArr);
       assignmentTot = computeSum(assignmentArr);

double actualScore = ((double) (wkSheetTot + assignmentTot)) * .4 + ((double) examArr[0]) * .15
+ ((double) examArr[1]) * .20 + ((double) examArr[2]) * .25;

if (actualScore >= 90) {

grade = "A";
} else if (actualScore >= 80 && actualScore < 90) {

grade = "B";
} else if (actualScore >= 70 && actualScore < 80) {

grade = "C";
} else if (actualScore >= 60 && actualScore < 70) {

grade = "D";
} else {

           grade = "F";
       }
       return grade;

}

/*************************output**************************/

Enter number of worksheets: 3
Enter MAX possible score for each worksheet: 50
Total points on worksheets: 150
Enter number of assignments: 3
Enter max possible score for each assignment: 50
Total points on exams: 300
Enter score in worksheet 1: 55
You must enter valid score!
Enter valid score: 45
Enter score in worksheet 2: 48
Enter score in worksheet 3: 30
Score on worksheets: 45 48 30
Enter score in assignment 1: 76
You must enter valid score!
Enter valid score: 75
You must enter valid score!
Enter valid score: 46
Enter score in assignment 2: 48
Enter score in assignment 3: 34
Score on Assignments: 46 48 34
Enter score in exam 1: 109
You must enter valid score!
Enter valid score: 98
Enter score in exam 2: 90
Enter score in exam 3: 87
Score on exams: 98 90 87
Grade is A
$2 Console X Search <terminated > ComputeGrade [Java Application] C:\Program Files\Java jre 1.8 Enter number of worksheets: 3$

Please let me know if you have any doubt or modify the answer, Thanks :)

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Answer 2

Answer #2

Screenshot of the Code:

import java.util.Scanner; /** * This class computes a lettergrade for a user. * Takes user input of scores in all worksheets, // create array to store each wksheet score int [] wksheetScoresArr = new int [numwk sheet]; /** ASSIGNMENTS **/ // Input num printArray(assignmentScoresArr); // Method to input exam scores from user readExams (examScoresArr, MAX_SCORE_EXAM, stdin); / * YOU NEED TO MODIFY THIS METHOD * This method is used to print an array. * It takes any type of array as input and does the // Check for the valid score. while(scores[iter] > maxScore) // Display the message. System.out.println(Score for worksheet double el = (double) (examArr[@]*0.15/100); double e2 = (double) (examArr[1]*0.2/100); double e3 = (double) (examArr[2]*0.25/

Sample Output:

$Problems Javadoc Declaration Console 3 <terminated > GradeCompute [Java Application) C:\Program Files\Java Enter number of wo$

Code to Copy:

import java.util.Scanner;
/**
* This class computes a lettergrade for a user.
* Takes user input of scores in all worksheets, assignemnts and exams during a
semester.
* Outputs a letter grade based on a scale.
* @author spal
*
*/
public class GradeCompute {

/**
* This Main method calls on several other methods to compute lettergrade for
a user.
* Instruction for students:
* 1. DO NOT MODIFY THIS METHOD. It should be exactly the same as provided.
* 2. READ this main method carefully, then write code for the associated
methods.
* @param args
*/

public static void main(String[] args) {

/** DO NOT MODIFY THE CODE IN THIS METHOD **/

// The number of exams and its total score is fixed.
final int NUM_EXAMS = 3;
final int MAX_SCORE_EXAM = 100;

// Create scanner to take input from user
Scanner stdin = new Scanner (System.in);

/** WORKSHEETS **/

// Input number of worksheets
System.out.print("Enter number of worksheets: ");

int numWksheet = stdin.nextInt();

// Input total points for a worksheet. All worksheets
//will have the same max value.
System.out.print("Enter max possible score for each worksheet: ");

int maxScoreOfEachWksheet = stdin.nextInt();

// Calculate total points for all worksheets and print it out
int wksheetTotal = numWksheet*maxScoreOfEachWksheet;

System.out.println ("Total points on Worksheets: "+ wksheetTotal);

// create array to store each wksheet score
int [] wksheetScoresArr = new int [numWksheet];

/** ASSIGNMENTS **/

// Input number of assignments
System.out.print("Enter number of assignments: ");

int numAssignmnt = stdin.nextInt();

// Input total points for an assignment.
//All assignments will have the same max value.
System.out.print("Enter max possible score for each assignment: ");

int maxScoreOfEachAssignmnt = stdin.nextInt();

// Calculate total points for all assignments and print it out
int assignmntTotal = numAssignmnt*maxScoreOfEachAssignmnt;

System.out.println ("Total points on Assignments: "+ assignmntTotal);

// create array to store each assignment score
int [] assignmentScoresArr = new int [numAssignmnt];

/** EXAMS **/

// calculate total points for all exams
int examTotal = NUM_EXAMS*MAX_SCORE_EXAM;

System.out.println ("Total points on Exams: "+ examTotal);

// array to store each exam score
int [] examScoresArr = new int[NUM_EXAMS];

/** Read values into arrays that store scores **/

// Method to input worksheet scores from user
readWkSheets(wksheetScoresArr, maxScoreOfEachWksheet, stdin);

// Print worksheet scores from array
System.out.print("Score on worksheets: ");

// Method to print the worksheet score array
printArray(wksheetScoresArr);

// Method to input assignment scores from user
readAssignments(assignmentScoresArr, maxScoreOfEachAssignmnt, stdin);

// Print assignment scores from array
System.out.print("Score on assignments: ");

printArray(assignmentScoresArr);

// Method to input exam scores from user
readExams(examScoresArr, MAX_SCORE_EXAM, stdin);

// Print assignment scores from array
System.out.print("Score on exams: ");

printArray(examScoresArr);

// Calculate grade
String grade =
computeGrade(wksheetScoresArr,assignmentScoresArr,examScoresArr,
wksheetTotal,assignmntTotal,examTotal);

// Print grade
System.out.println("Grade is "+grade);

stdin.close();

}// end main

/**
* YOU NEED TO MODIFY THIS METHOD
* This method computes and returns sum of all values in an integer array.
* It takes an int[] array as input and does the following,
* 1. computes the sum of all values stored in the array.
* 2. returns the sum
* @param array - integer array[]
* @return sum of all values in the int array[]
*/
public static int computeSum(int[] array) {

   // Define the variable.
int sum= 0;

// Iterate through the array
// Evaluate the sum.
for(int i=0;i<array.length;i++)
sum += array[i];
// System.out.println(sum);
// Return the sum.
return sum;
}

/**
* YOU NEED TO MODIFY THIS METHOD
* This method is used to print an array.
* It takes any type of array as input and does the following,
* 1. prints all the values in the same line, with one space between
them
* Example output on console: 5 4 3 2 1
* @param array - int[] array
*/
public static void printArray (int[] array) {

   // Iterate through the array
   // Print the sum.
for(int iter=0;iter<array.length;iter++)
System.out.print(array[iter]+" ");
System.out.println();
}

/**
* YOU NEED TO MODIFY THIS METHOD
* This method is used to take user input and fill the array created in the
main method
* that stores worksheet scores.
* You must write code to do the following,
* 1. Ask user to input obtained score for all the worksheets
* 2. Check if user has entered a valid value (<= maxScore);
* example: say the worksheet is worth 20 points total, you
must check
* that the user input score <= 20
* 3. If the user inputs a value > maxScore, it is an invalid value
* DO NOT STORE AN INVALID VALUE IN THE ARRAY. Instead, ask
the user to enter a valid value.
* You must do this everytime user enters an invalid value
* 4. When user inputs a valid value, store it in the scores[] array
*
* @param scores - array that stores points obtained on each wksheet
* @param maxScore - max possible points for a worksheet (total points in one
worksheet)
* @param in - scanner object to input scores
*/
public static void readWkSheets(int [] scores, int maxScore, Scanner in) {

   // Display the message.
System.out.println("Input the score for "+scores.length+" worksheets : ");

// Iterate through the length of scores array.
for(int iter=0;iter<scores.length;iter++)
{
   // Prompt the user for input.
System.out.print("Worksheet "+(iter+1)+" : ");
scores[iter] = in.nextInt();

// Check for the valid score.
while(scores[iter] > maxScore)
{
   // Display the message.
System.out.println("Score for worksheet cannot be greater than "+maxScore);

//Prompt the user to input again.
System.out.print("Worksheet "+(iter+1)+" : ");
scores[iter] = in.nextInt();
}
}
}// end readWkSheets

/**
* YOU NEED TO MODIFY THIS METHOD
* This method is used to take user input and fill the array created in the
main method
* that stores assignment scores.
* You must write code to do the following,
* 1. Ask user to input obtained score for all the assignment
* 2. Check if user has entered a valid value (<= maxScore);
* example: say the assignment is worth 50 points total, you
must check
* that the user input score <= 50
* 3. If the user inputs a value > maxScore, it is an invalid value
* DO NOT STORE AN INVALID VALUE IN THE ARRAY. Instead, ask
the user to enter a valid value.
* You must do this everytime user enters an invalid value
* 4. When user inputs a valid value, store it in the scores[] array
*
* @param scores - integer array that stores scores obtained in each
assignment
* @param maxScore - max possible score for an assignment
* @param in - scanner object to input scores
*/
public static void readAssignments(int[] scores, int maxScore, Scanner in) {

   // Display the message.
System.out.println("Input the score for "+scores.length+" assignments : ");

// Iterate through the scores.
for(int iter=0;iter<scores.length;iter++)
{
   // Prompt the user to enter the assignment score.
System.out.print("Assignment "+(iter+1)+" : ");
scores[iter] = in.nextInt();

// Check for the valid score.
while(scores[iter] > maxScore)
{
System.out.println("Score for assignment cannot be greater than "+maxScore);
System.out.print("Assignment "+(iter+1)+" : ");
scores[iter] = in.nextInt();

}
}
}// end readAssignments

/**
* YOU NEED TO MODIFY THIS METHOD
* This method is used to take user input and fill the array created in the
main method
* that stores exam scores.
* You must write code to do the following,
* 1. Ask user to input obtained score for all the exam
* 2. Check if user has entered a valid value (<= maxScore);
* example: say the assignment is worth 100 points total, you
must check
* that the user input score <= 100
* 3. If the user inputs a value > maxScore, it is an invalid value
* DO NOT STORE AN INVALID VALUE IN THE ARRAY. Instead, ask
the user to enter a valid value.
* You must do this everytime user enters an invalid value
* 4. When user inputs a valid value, store it in the scores[] array
*
* @param scores - integer array that stores scores obtained in each exam
* @param maxScore - max possible score for an exam
* @param in - scanner object to input scores
*/
public static void readExams(int[] scores, int maxScore, Scanner in) {

   // Display the message.
System.out.println("Input the score for "+scores.length+" exams : ");

// Iterate through the scores.
for(int iter=0;iter<scores.length;iter++)
{
   // Prompt the user to enter the exam score.
System.out.print("Exam "+(iter+1)+" : ");
scores[iter] = in.nextInt();

// Check for the valid score.
while(scores[iter] > maxScore)
{
System.out.println("Score for exam cannot be greater than "+maxScore);
System.out.print("Exam "+(iter+1)+" : ");
scores[iter] = in.nextInt();
}
}
}// end readExams

/**
* YOU NEED TO MODIFY THIS METHOD
* This method calculates a letter grade from score obtained by student/user
* @param wksheetArr - array to store worksheet scores
* @param assignmentArr - array to store assignment scores
* @param examArr - array to score exam scores
* @param wksheetTot - sum of total possible points for all worksheets
* @param assignmntTot -sum of total possible points for all assignments
* @param examTot - sum of total possible points for all exams
* @return - a letter grade
*/
public static String computeGrade(int[] wksheetArr,int[] assignmentArr,
       int[] examArr, int wksheetTot,int assignmntTot,int examTot) {

   // Compute the work sheet total.
int wrkSheetSum = computeSum(wksheetArr);

// Compute the assignment total.
int assignmentSum = computeSum(assignmentArr);

// Check if the student fails.
// Return F if student fails.
double t1 = (wrkSheetSum + assignmentSum);
double t2 = (wksheetTot+assignmntTot);
double wkas = t1/t2;

if( wkas< 0.5)
return "F";

// Compute the exam total.
int examTotal = computeSum(examArr);

double es = (double)examTotal/300;

// Check if the student fails.
// Return F if student fails.
if(es < (0.50))
return "F";

double e1 = (double)(examArr[0]*0.15/100);
double e2 = (double)(examArr[1]*0.2/100);
double e3 = (double)(examArr[2]*0.25/100);
double t3 = ((t1)/40)*0.4;

// Compute the overall score.
double s = t3 + e1 + e2 + e3;

s= s*100;

// Compute the grade.
// Return the grade.
if(s >= 90)
return "A";
else if(s >= 80)
return "B";
else if(s >= 70)
return "C";
else if(s >= 60)
return "D";
else
return "F";
}
}// end class GradeCompute

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