Project1.java

Project1.java

import java.util.Scanner;

public class Project1
{
    public static void main (String[] args)
    {
        Scanner kb = new Scanner(System.in);
        Boolean running = true;
        double originalGrade = 0;
        int userSelection = 0;
        int pointSelection = 0;
        double percentageSelection = 0;
        double newGrade = 0;
        double curvePts = 0;

        originalGrade = askUser();//asks for original grade

        while(running) {

            userSelection = menuSelection();//displays menu selection and asks for selection



            switch(userSelection)//processes the user's selections
            {
                case 1://process for input of 1
                        curvePts = 10;
                        newGrade = applyCurve(curvePts, originalGrade);
                        System.out.println("\n\n\n\tCurve applied: " + curvePts + " points");
                        System.out.println("\n\tAdjusted grade: " + newGrade);
                        break;
                case 2://process for input of 2
                        curvePts = originalGrade * .10;
                        newGrade = applyCurve(curvePts, originalGrade);
                        System.out.println("\n\n\n\tCurve applied: " + curvePts + " points");
                        System.out.println("\n\tAdjusted grade: " + newGrade);
                        break;
                case 3://process for input of 3
                        pointSelection = optionThree();
                        curvePts = pointSelection;
                        newGrade = applyCurve(curvePts, originalGrade);
                        System.out.println("\n\n\n\tCurve applied: " + curvePts + " points");
                        System.out.println("\n\tAdjusted grade: " + newGrade);
                        break;
                case 4://process of input of 4
                        percentageSelection = optionFour();
                        curvePts = percentCalc(percentageSelection, originalGrade);
                        newGrade = applyCurve(curvePts, originalGrade);
                        System.out.println("\n\n\n\tCurve applied: " + curvePts + " points");
                        System.out.println("\n\tAdjusted grade: " + newGrade);
                        break;
                case 5://process of input of 5 (exit)
                        running = false;
                        System.exit(0);
                        break;
            }//end switch

            freezeScreen();//freezes screen and asks user to hit ENTER to continue


        }


    }//end main







    public static Double askUser()
    {
        Scanner kb = new Scanner(System.in);
        double originalGrade = 0;
        clearScreen();
        System.out.print("What is the original grade? ");
        originalGrade = kb.nextDouble();
        while(originalGrade < 0 || originalGrade > 100)//input validation for grades entered below  or above 100
            {
                System.out.print("\n\nError. Please enter a grade between 0 and 100.");
                System.out.print("\n\n\nWhat is the original grade? ");
                originalGrade = kb.nextDouble();
            }//end while
        return originalGrade;
    }//end askUser

    public static int menuSelection()
    {
        Scanner kb = new Scanner(System.in);
        int userSelection = 0;
        clearScreen();
        System.out.print("\n\n\tGrade Adjuster" 
                            + "\n\tby Haley Hughes"
                            + "\n"
                            + "\n******************************"
                            + "\n"
                            + "\n1. Curve by 10 points"
                            + "\n2. Curve by 10 percent"
                            + "\n3. Curve by a given number of points"
                            + "\n4. Curve by a given percentage"
                            + "\n5. Quit"
                            + "\n\nEnter your selection: ");
        userSelection = kb.nextInt();
        while (userSelection < 1 || userSelection > 5)//input validation for input less that 1 or more than 5
            {
                System.out.print("\n\nError. Please select 1 through 5.\n\n");
                System.out.print("\n\n\tGrade Adjuster" 
                            + "\n\tby Haley Hughes"
                            + "\n"
                            + "\n******************************"
                            + "\n"
                            + "\n1. Curve by 10 points"
                            + "\n2. Curve by 10 percent"
                            + "\n3. Curve by a given number of points"
                            + "\n4. Curve by a given percentage"
                            + "\n5. Quit"
                            + "\n\nEnter your selection: ");
        userSelection = kb.nextInt();
            }//end while
        return userSelection;
    }//end menuSelection

    public static void freezeScreen()
    {
        Scanner kb = new Scanner(System.in);
        System.out.println("\n\npress ENTER to return to the Menu...");
        kb.nextLine();//catches enter key input

        //menuSelection();//displays the menu
    }//end freezeScreen

    public static void clearScreen()
    {
        System.out.println("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
    }//end clearScreen

    public static int optionThree()
    {
        Scanner kb = new Scanner(System.in);
        int pointSelection = 0;
        System.out.print("\n\n\nHow many points should be applied to curve the grade? ");
        pointSelection = kb.nextInt();
        while (pointSelection < 0 || pointSelection > 25)//input validation for input less than 0 or more than 25
            {
                System.out.println("\n\nError. Please enter a number between 0 and 25.");
                System.out.print("\n\nHow many points should be applied to curve the grade? ");
                pointSelection = kb.nextInt();
            }//end while
        return pointSelection;
    }//end optionThree

    public static double optionFour()
    {
        Scanner kb = new Scanner(System.in);
        double percentageSelection = 0;
        System.out.print("\nEnter the percentage of the curve:  "
                            + "(ex. 10% would be entered as .10)  ");
        percentageSelection = kb.nextDouble();
        while (percentageSelection < .0 || percentageSelection > .50)//input validation for input less than .0 or more than .50
            {
                System.out.println("\n\nError. Please enter a percentage between .0 and .50.");
                System.out.print("\n\nEnter the percentage of the curve:  "
                            + "(ex. 10% would be entered as .10)  ");
                percentageSelection = kb.nextDouble();
            }//end while
            return percentageSelection;
    }//end optionFour

    public static double percentCalc(double percentageSelection, double originalGrade)
    {
        double curvePts = 0;
        curvePts = originalGrade * percentageSelection;
        return curvePts;
    }//end percentCalc

    public static double applyCurve(double originalGrade, double curvePts)
    {
        double newGrade = 0;
        newGrade = originalGrade + curvePts;
        while (newGrade > 100)
            {
                newGrade = 100;
            }//end while
        return newGrade;
    }//end applyCurve
}//end Project1