MemoryExerciser.java

/*
Name: Nicholas Keen
Course: CIS 201 - Computer Science I
Section: 003
Assignment: 1
*/
import java.util.*;

public class MemoryExerciser {

    public static final int MAX_SIZE = 10;
    
    public static void main(String[] args){
        
        Scanner input = new Scanner(System.in);
        
        // prompt the user for the number of numbers
        System.out.print("How many integers (up to " + MAX_SIZE);
        System.out.print(") would you like to see? ");
        // get the number of numbers
        int size = input.nextInt();
        if(size > MAX_SIZE)
	   size = MAX_SIZE;
	   
	int[] numbers = new int[size]; // the list of integeres
        // fill the list with 'size' random numbers
        makeList(numbers);
	
	// display the numbers
	for(int i = 0; i < numbers.length; i++)
	    System.out.println(numbers[i]);
	    
	// prompt the user to hide the numbers
	System.out.print("Type 1 when you are ready to hide the numbers: ");
	input.nextInt();
	// scroll the numbers off the terminal
	for(int i = 0; i < 50; i++)
	    System.out.println();
	    
	// get the user's answer, report how many are correct
	System.out.println("Score: " + numCorrect(numbers) +
	                   " correct out of " + size + " numbers.");
    }
    
    // fills the list with 'size' unique random numbers
    public static void makeList(int[] list) {
        Random rand = new Random();
        int count = 0;
        while(count < list.length) {
            int number = rand.nextInt(1000) + 1;
            if (!found(list, count, number)) {
                // add the number to the list
                list[count] = number;
                count++;
            }
        }
    }
    
    // conducts a search to find the value in the list so far
    // returns true if found
    public static boolean found(int[] a, int size, int value) {
        for(int i = 0; i < size; i++)
            if (a[i] == value)
            // key is found
            return true;
        // key not found 
        return false;
    }
    
    // gets the user's answers and returns the number correct against the list
    public static int numCorrect(int[] list) {
        Scanner input = new Scanner(System .in);
        int correct = 0;
        System.out.print("Enter the " + list.length + " numbers: ");
        for(int i = 0; i < list.length; i++) {
            int next = input.nextInt();
            if(list[i] == next)
                correct++;
        }
        return correct;
    }
}