Thread: Reusing an Entered List of Array Elements

If you see in the code below where I print "Would you like to use previous key" I need to be able to save the previous key answers to be used again.. not sure how to go about doing this..

import java.util.Scanner;
 
public class Main {
	public static void main(String[] args) {
		String[] studentName = new String[20];
		int[] studentAverage = new int[20];
		Scanner input = new Scanner(System.in);
		int numberOf = 0;
		int sub = 0;
		int x = 0;
		int highest = 0;
		int averageHolder = 0;
		String[] answers;
		String[] correct;
		int whichStudent = 0;
		int timesRan = 0;
		String AvToOr, letterGrade, stuNameAsk, goOn, sameKey, topStudent = null, keyRem;
		while (x == 0) {
			whichStudent = sub;
			if (timesRan >= 1) {
				System.out
						.println("Would you like to use the same key as the previous one entered? Y for yes and N for no (Case does not matter).");
				keyRem = input.next();
				if (keyRem.equalsIgnoreCase("y")) {
					System.out.println();
				} else if (keyRem.equalsIgnoreCase("n")) {
 
				}
			}
			System.out
					.println("Enter student name. (Current limit of amount of students is 20.)");
			stuNameAsk = input.next();
			studentName[sub] = stuNameAsk;
 
 
			System.out
					.println("How many questions would you like to input? (Maximum is infinite.)");
			int num = input.nextInt(); // get the number of times to ask
			answers = new String[num]; // student's answers
			correct = new String[num]; // for teachers
			for (int x1 = 0; x1 < num; x1++) {
				System.out
						.println("Enter the answer for question number: "
								+ (x1 + 1)
								+ ". Answer types are A,B,C,D,E, etc. Case does not matter.");
				correct[x1] = input.next();
			}
			System.out.println("Now for the students.");
			for (int x1 = 0; x1 < num; x1++) {
				System.out
						.println("Enter the student answer for question number: "
								+ (x1 + 1));
				answers[x1] = input.next();
			}
			int average = 0; // his/her grade
			for (int x1 = 0; x1 < num; x1++)
				if (correct[x1].equalsIgnoreCase(answers[x1]))
					average++;
 
			average = (int) (((double) average) / ((double) num) * 100);
 
			studentAverage[sub] = average;
			System.out.println(studentName[0 + whichStudent] + "'s grade is "
					+ studentAverage[0 + whichStudent] + "%");
			System.out
					.println("Do you want to enter another student? Type Y for yes and N for no.");
			goOn = input.next();
 
			if (goOn.equalsIgnoreCase("n")) {
				x++;
 
			} else if (goOn.equalsIgnoreCase("y")) {
				sub++;
				timesRan++;
 
			} else {
				System.out
						.println("Your answer is not valid. Please try again.");
				System.out.println("Do you want to enter another student?");
				goOn = input.next();
 
				if (goOn.equalsIgnoreCase("n")) {
					x++;
 
				} else if (goOn.equalsIgnoreCase("y")) {
					sub++;
					timesRan++;
 
				} else {
					System.out
							.println("Your answer is not valid. Program restarted.");
				}
			}
		}
		System.out.println("All entered students and their averages:");
		for (int varTest = 0; varTest <= timesRan; varTest++) {
			System.out.println("");
			System.out.println(studentName[varTest] + "'s average is "
					+ studentAverage[varTest] + "%");
		}
		System.out.println("");
		System.out
				.println("Would you like to (A)verage, find the (top) grade, or (end) the program? (Case does not matter)");
		AvToOr = input.next();
 
		if (AvToOr.equalsIgnoreCase("A")) {
			for (int varTest = 0; varTest <= timesRan; varTest++) {
				averageHolder = averageHolder + studentAverage[varTest];
 
			}
			System.out.println(averageHolder / (timesRan + 1) + "%"
					+ " is the average of all the students entered.");
		} else if (AvToOr.equalsIgnoreCase("top")) {
			for (int index = 0; index <= timesRan; index++) {
				if (studentAverage[index] > highest)
					highest = studentAverage[index];
 
			}
			for (int tester = 0; tester <= timesRan; tester++) {
				if (studentAverage[tester] == highest) {
					topStudent = studentName[tester];
					tester = timesRan++;
				}
 
				else {
 
				}
			}
			System.out.println(topStudent + " had the highest grade with a "
					+ highest + "%");
		} else if (AvToOr.equalsIgnoreCase("end")) {
 
		}
 
	}
}

If you want to save something use a variable.

Originally Posted by Cornix

If you want to save something use a variable.

But how do I use a variable for when the amount of questions in the key will never be constant?

What exactly is this "key" you are talking about? Perhaps you should create a class for that or an interface.

Originally Posted by Cornix

What exactly is this "key" you are talking about? Perhaps you should create a class for that or an interface.

The program is a grading program. The teacher enters the "key" which are the correct answers for the assignment, test, quiz, etc. then the students answers are entered and they are compared to get the students grade.

But what is it? A number? A string? A complex object with several attributes?

Originally Posted by Cornix

But what is it? A number? A string? A complex object with several attributes?

Its a String array.
If you ran my program or at least read it entirely it might help you a little...

I am not going to read 50+ lines of code just to find that out. If the key is a string array, why are you not able to save it in a variable?

and then how would I put those variables into play?

What do you want to use them for?