// COMP 1631 (Fall 2006)
// Author(s):  1631 instructors
//
// Lab Test code - Wednesday solution
//
// This class is just a holder for the main method which contains two loops
// and a blank space where students are required to insert code (which will
// involve another loop).

public class LoopyWednesday
{
    public static void main(String[] args)
    {
        final int defaultSize = 50;   // default size of array
        int n;                        // user-specified size of array
        int[] data;                   // uninitialized array
        int index;                    // index into array

        // get size of array and "build" it
        n = Console.readInt("Please enter a positive integer: ");
        if (n <= 0)
        {
            n = defaultSize;
        } // if
        data = new int[n];
        
        // fill array with values 0, 1, 2, 3, ...
        index = 0;
        while (index < n)
        {
            data[index] = index;
            index++;
        } // while

        //------------------------------------------------------------------------
        
		// fill the array with the sequence 0, -1, -4, -9, -16, -25, ...
        index = 0;
        while (index < n)
        {
            data[index] = - data[index] * data[index];
            index++;
        } // while

        //------------------------------------------------------------------------
        
        // print out the array
        System.out.println();        // blank line
        System.out.println("Here are the values in the array:");
        index = 0;
        while (index < n)
        {
            System.out.println("   data[" + index + "] = " + data[index]);
            index++;
        } // while
    } // main method

} // end class LoopyWednesday