Thread: Almost have my project done, just need help with one last thing.

Ok, so my program works fine for the most part, except for a few minor issues that I absolutely have to fix. So, let me start by explaining a few things about the program. The program is suppose to get a number from the user, then when you select one of the options from the Menu(), it will call the Method pertaining to the option the user chooses. After that Method concludes, the program should bring the Menu() back up, so that the user may use the program again. This is where my problem occurs. The program will work fine the first time an option is selected, but when the Menu() is called again, whenever the user makes a selection, the program just ends. For examples of my Methods that call the Menu() back, see lines 139, 152, 165, 185, and 108.

import java.util.Scanner; //for the ability to get input from 
						  //the keyboard 
import java.text.DecimalFormat;
 
public class Project3
{					  
 
	public static void main(String[] args)
	{
		//enter variable below
		double orgGrade = 0;   //Variable for the Original Grade
		double newGrade = 0;	   //Variable for the Grade after the Curve
		double gradePercent = 0;   //Variable for displaying the percentage from option 4.
		double points = 10.0;  //Variable for points added
		double percent = .10;   //Variable for given percentage
		double gpoints = 0;          //Variable for the Given points
		double gpercent = 0;         //Variable for the Given percentage
		int a = 0;					 // Variable for Menu Selection
		String Msg = "Press ENTER to return to the menu";
		Scanner keyboard = new Scanner(System.in);
		DecimalFormat df = new DecimalFormat("00.0");
		//start program here
 
		clearScreen();
 
		orgGrade = orginalgrade(orgGrade);  //get users grade. 
 
		clearScreen(); //clear the screen
 
 
		a = menu(a, Msg);				//show menu/selections	
 
 
 
 
 
 
 
			switch (a)
			{	
				case 1:
				addPoints(a, newGrade, orgGrade, points, Msg);
				break;
 
				case 2:
				addPercent(a, newGrade, orgGrade, percent, gradePercent, Msg);
				break;
 
				case 3:
				givenPoints(a, newGrade, orgGrade, gpoints, Msg);
				break;
 
				case 4:
				givenPercent(a, newGrade, orgGrade, gpercent, Msg);
				break;
 
				case 5:
 
				break;
			}
 
 
 
 
 
 
 
 
 
 
 
 
	}//end main
	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\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\n\n\n\n\n\n\n\n\n\n\n\n\n");
	}//end clearScreen
 
	public static void freezeScreen()
	{
		Scanner keyboard = new Scanner(System.in);
 
		System.out.print("	       -- Press Enter to Continue --");
		keyboard.nextLine();
	}//end freezeScreen
 
	public static void freezeScreen(String Msg)
	{
		Scanner keyboard = new Scanner(System.in);
 
		System.out.print(Msg);
		keyboard.nextLine();
 
	}//end freezeScreen
 
	public static double orginalgrade(double orgGrade)
	{
		Scanner keyboard = new Scanner(System.in);
 
 
 
		System.out.print("What is the original grade? ");     //Get original grade from user
		orgGrade = keyboard.nextDouble();
 
		return orgGrade; 
	}//end orgGrade
 
	public static int menu(int a, String Msg) 
	{
 
		Scanner keyboard = new Scanner(System.in);
 
		System.out.println("	    Grade Adjuster");
		System.out.println("	   by Aaron Webster ");   // Greet user
		System.out.println("******************************\n");
		System.out.println("1. Curve by 10 points.");              //menu options here
		System.out.println("2. Curve by 10 percent.");
		System.out.println("3. Curve by a certain number of points.");
		System.out.println("4. Curve by a given percentage"); 
		System.out.println("5. Exit program\n");
		System.out.print("Enter your selection here: ");
		a = keyboard.nextInt();
 
		if (a > 5 || a < 1)
		{
			System.out.print("That is not a valid option!\n\n");
			freezeScreen(Msg);
			clearScreen();
			menu(a, Msg);
 
			return a;
		}
 
 
 
		return a;
	}//end Menu
 
	public static double addPoints(int a, double newGrade, double orgGrade, double points, String Msg)
	{
 
				newGrade = orgGrade + points;
				System.out.println("Curve applied: " + points);
				System.out.println("Adjusted grade: " + newGrade);
				freezeScreen(Msg);
				clearScreen();
				menu(a, Msg);
 
		return newGrade;
	}//end addPoints	
 
	public static double addPercent(int a, double newGrade, double orgGrade, double percent, double gradePercent, String Msg)
	{
				newGrade = (orgGrade * percent) + orgGrade; 
				gradePercent = orgGrade * percent;
				System.out.println("Curve applied: " + gradePercent);
				System.out.println("Adjusted grade: " + newGrade);
				freezeScreen(Msg);
				clearScreen();
				menu(a, Msg);
 
		return newGrade;
	}//end addPercent
 
	public static double givenPoints(int a, double newGrade, double orgGrade, double gpoints, String Msg)
	{
				Scanner keyboard = new Scanner(System.in);
 
				System.out.println("How many points should be applied to curve the grade?");
				gpoints = keyboard.nextDouble();
				newGrade = gpoints + orgGrade;
				if (newGrade > 100)
				{
					newGrade = 100;
				}
				System.out.println("Curve applied: " + gpoints);
				System.out.println("Adjusted grade: " + newGrade);
				freezeScreen(Msg);
				clearScreen();
				menu(a, Msg);
 
		return newGrade;
	}//end givenPoints
 
	public static double givenPercent(int a, double newGrade, double orgGrade, double gpercent, String Msg)
	{
				Scanner keyboard = new Scanner(System.in);
 
				System.out.println("Enter the percentage of the curve. (Ex. 10% would be .10)");
				gpercent = keyboard.nextDouble();
				newGrade = (gpercent * orgGrade) + orgGrade;
				if (newGrade > 100)
				{
					newGrade = 100;
				}
				System.out.println("Curve applied: " + gpercent);
				System.out.println("Adjusted grade: " + newGrade);
				freezeScreen(Msg);
				clearScreen();
				menu(a, Msg);
 
		return newGrade;
	}//end givenPercent
}

Maybe try using a do-while loop for the switch statement and update the value for (a) every time the user input a selection.

sorry couldn't understand your program but try what I said, might work.

No error, it just ends. Like, the Menu() is called again, you enter a selection but then it just ends. It never goes back to the switch statement.

--- Update ---

What is a do-while loop? and how do I update 'a' value? I tried updating it last night, and I couldn't figure it out

Where would that need to go into my code? In every one of the methods I wrote? Because 'a' gets is the variable that holds the selection from the Menu(), so basically 'a' starts at 0, then when the Menu() is called, it is assigned either 1-4, the program calls whichever method is assigned to that number, and then the Menu() is called again, except when the Menu() is called for the second time, even if I hit a different selection, 'a' doesn't change it's value.

Ok, thanks a lot man, I'll try that out as soon as I can and post results

--- Update ---

ok, so I added a loop to my Main(), and removed the other things from the Methods. So, I have it now to where the program loops the menu(), but it doesn't execute anything in the switch statement. Should I add the switch statement to the loop?