// Program to test solutions to problem #6 on the cse143 midterm, spring 2011.
// Fill in your solution to removeFront, then compile and run the program
// note: this program doesn't test the exception that should be thrown

import java.util.*;

class ArrayIntList {
    public void removeFront(int n) {
        // fill in your solution here
        // you can also rename the parameter above
    }

    public void removeFront2(int n) {
        if (n < 0 || n > size)
            throw new IllegalArgumentException();
        for (int i = n; i < size; i++)
            elementData[i - n] = elementData[i];
        size -= n;
    }

    private int[] elementData; // list of integers
    private int size;          // current number of elements in the list

    public static final int DEFAULT_CAPACITY = 100;

    // post: constructs an empty list of default capacity
    public ArrayIntList() {
        elementData = new int[DEFAULT_CAPACITY];
        size = 0;
    }

    // post: creates a comma-separated, bracketed version of the list
    public String toString() {
        if (size == 0) {
            return "[]";
        } else {
            String result = "[" + elementData[0];
            for (int i = 1; i < size; i++) {
                result += ", " + elementData[i];
            }
            result += "]";
            return result;
        }
    }

    // post: appends the given value to the end of the list
    public void add(int value) {
        elementData[size] = value;
        size++;
    }
}

public class Test6 {
    public static void main(String[] args) {
        for (int i = 0; i <= 10; i++)
            test(new int[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, i);
        test(new int[] {8, 17, 9, 24, 42, 3, 8}, 4);
    }

    public static void test(int[] data, int num) {
        ArrayIntList list1 = new ArrayIntList();
        ArrayIntList list2 = new ArrayIntList();
        for (int n : data) {
            list1.add(n);
            list2.add(n);
        }
        System.out.println("removing " + num);
        System.out.println("list   = " + list1);
        list1.removeFront2(num);
        System.out.println("result = " + list1);
        boolean fail = false;
        try {
            list2.removeFront(num);
            System.out.println("yours  = " + list2);
            if (!list1.toString().equals(list2.toString())) {
                fail = true;
            }
        } catch (RuntimeException e) {
            System.out.println("    threw " + e);
            fail = true;
        }
        if (fail)
            System.out.println("failed");
        else
            System.out.println("passed");
        System.out.println();
    }
}