// Addition program
//
import java.awt.*;  // import the java.awt package
import java.applet.Applet;

public class Addition extends Applet {
    Label prompt;       // prompt user to input
    TextField input;    // input values here
    int number;         // store input value
    int sum;            // store sum of integers

    // set up the graphical user interface components
    // and initialize variables
    public void init()
    {
        prompt = new Label("Enter integer and press Enter:");
        input  = new TextField(10);
        add(prompt);    // put prompt on applet
        add(input);     // put input on applet
        sum = 0;        // set sum to 0
    }

    // process user's action on the input text field
    public boolean action(Event e, Object o)
    {
        number = Integer.parseInt(o.toString() ); // get number
        input.setText("");  // clear data entry field
        sum = sum + number; //add number to sum
        showStatus(Integer.toString(sum) ); // show result
        return true;    // indicate user's action was processed
    }
}