import java.applet.Applet;
import java.awt.*;

public class test1 extends Applet {

/*-------------------------------------------------------*/

/* 入力情報 */
int A = 1;
int B = 100;

/* 出力情報 */
int C;

/* パズル問題を解く */
void puzzle() {
    int i;

    C = 0;
    for (i=A; i<=B; i++)
        C += i;
}

/*-------------------------------------------------------*/

public void init() {
    setBackground(new Color(200,200,200));
    setLayout(new BorderLayout());
    Panel psouth = new Panel();
    psouth.add(new Button("click"));
    add("South", psouth);
}

public void paint(Graphics g) {
    g.setFont(new Font("Helvetica",Font.BOLD,14));
    if (C == 0)
        g.drawString("1 to 100 = ",10,30);
    else
        g.drawString("1 to 100 = "+Integer.toString(C),10,30);
}

public boolean action(Event e, Object arg) {
    if ("click".equals(arg)) {
        if (C == 0)
            puzzle();
        else
            C = 0;
        repaint();
    }
    return true;
}
}