import awb.*;
import java.awt.*;
import java.awt.event.*;

public class ArrayStuff extends java.applet.Applet implements ActionListener
{
    TextField mInstruct, mAnswer;
    IntField iCount;
    int B[];
    Button bStore, bTotal, bLargest, bLargeIndex;
    int count, nextFree;

    int Largest(int[] data, int firstempty)
    {
        int k, big;
        big = data[0];
        k = 1;
        while (k < firstempty)
        {
            if (data[k] > big)
            {
                big = data[k];
            }
            k = k + 1;
        }
        return big;
    }

    int LargeIndex(int[] data, int firstempty)
    {
        int k, indexBig;
        indexBig = 0;
        k = 1;
        while (k < firstempty)
        {
            if (data[k] > data[indexBig])
            {
                indexBig = k;
            }
            k = k + 1;
        }
        return indexBig;
    }

    int SumArray(int[] data, int firstempty)
    {
        int k, sum;
        k = 0;
        sum = 0;
        while (k < firstempty)
        {
            sum = sum + data[k];
            k = k + 1;
        }
        return sum;
    }

    public void init()
    {
        B = new int[100];
        mInstruct = new TextField(70);
        mAnswer = new TextField(70);
        mInstruct.setText("Enter Count, then press Store button");
        iCount = new IntField(10);
        bStore = new Button("Store");
        bTotal = new Button("Total");
        bLargest = new Button("Largest");
        bLargeIndex = new Button("LargeIndex");

        bStore.addActionListener(this);
        bTotal.addActionListener(this);
        bLargest.addActionListener(this);
        bLargeIndex.addActionListener(this);

        add(mInstruct);
        add(iCount);
        add(bStore);
        add(bTotal);
        add(bLargest);
        add(bLargeIndex);
        add(mAnswer);
    }

    public void actionPerformed(ActionEvent event)
    {
        int value, total;;
        Object cause = event.getSource();

        if (cause == bStore)
        {
            value = iCount.getInt();
            B[nextFree] = value;
            nextFree = nextFree + 1;
            iCount.setInt();     // clear IntField
        }
        if (cause == bTotal)
        {
            total = SumArray(B, nextFree);
            mAnswer.setText("The total of "+nextFree+" items is "+total);
        }
        if (cause == bLargest)
        {
            value = Largest(B, nextFree);
            mAnswer.setText("The largest of "+nextFree+" items is "+value);
        }
        if (cause == bLargeIndex)
        {
            value = LargeIndex(B, nextFree);
            mAnswer.setText("The location of the largest item is "+value);
        }
    }
}