// ------------------------------------------------------------------
// Importing Collections of Classes
// ------------------------------------------------------------------
import java.awt.* ; 
import java.applet.* ; 

public class SubroutinesAndFunctions extends Applet 
{
//  ----------------------------------------------------------------
//  Declaration of Variables
//  ----------------------------------------------------------------
    TextField mytext1 ;
    TextField mytext2 ;
    int intNum1 ; 
    int intNum2 ; 
    int intSum  ; 

//  ----------------------------------------------------------------
//  Init Block 
//  ----------------------------------------------------------------
    public void init()
    {
        mytext1 = new TextField(5) ; 
        mytext2 = new TextField(5) ; 
        add(mytext1) ; 
        add(mytext2) ; 
    }

//  ----------------------------------------------------------------
//  Paint Block
//  ----------------------------------------------------------------
    public void paint(Graphics g)
    { 
//      ------------------------------------------------------------
//      Subroutine Call
//      ------------------------------------------------------------
        DrawInstructions(g) ; 
        String strText1  ; 
        String strText2  ; 
        strText1 = mytext1.getText() ; 
        strText2 = mytext2.getText() ; 
        intNum1 = Integer.parseInt(strText1) ; 
        intNum2 = Integer.parseInt(strText2) ; 
//      ------------------------------------------------------------
//      Function Call
//      ------------------------------------------------------------
        intSum = AddTwoIntegers() ; 
        String strResult  ;
        strResult = "The Sum of the Integers is : " ; 
        strResult += String.valueOf(intSum) ; 
        g.drawString( strResult , 40 , 65 ) ;  
    } 

//  ----------------------------------------------------------------
//  Action Block
//  ----------------------------------------------------------------
    public boolean action(Event event , Object arg )
    {
        repaint() ;
        return true ; 
    } 

//  ----------------------------------------------------------------
//  Subroutine Definition
//  ----------------------------------------------------------------
    void DrawInstructions(Graphics g) 
    {
        g.drawString("Subroutine Example" , 40 , 50 ) ; 
    }

//  ----------------------------------------------------------------
//  Function Definition
//  ----------------------------------------------------------------
    int AddTwoIntegers() 
    { 
        intSum = intNum1 + intNum2 ; 
        return intSum ; 
    } 
}