oops in python.

Question

1. Write a program using object oriented method to calculate the area. It should require two attributes width W and Height H.

2. Write a program using OOP method to calculate the area. It should require two values of attributes W and H (the user will enter the values of w and h in run time).

Answer 1

import java.io.*;

class RectangleArea

{

private double width;

private double length;

//constructor

RectangleArea ( double l, double w)

{

width = w; length = l;

}

public double GetLength() { return(length); }

public double GetWidth() { return(width); }

public double Area() { return(width*length); }

public double PromptForDouble( String promptMsg) throws IOException

{

double dblNum=0;

String inbuff=null;

Console console = System.console();

do

{

System.out.print(promptMsg);

inbuff = console.readLine();

dblNum = Double.parseDouble(inbuff);

} while (dblNum<=0);

return(dblNum);

} //PromptForDouble

public static void main( String args[])

{

double l,w;

l=w=0;

RectangleArea dummyInput = new RectangleArea(0,0);

try

{

l = dummyInput.PromptForDouble(" Please input the length :>");

w = dummyInput.PromptForDouble(" Please input the width :>");

}

catch (IOException ex) { System.out.println(" input exception has occurred"); }

RectangleArea myRectangleArea = new RectangleArea(l,w);

System.out.println("**********************************************************");

System.out.println(" Width is " + myRectangleArea.GetWidth() );

System.out.println(" Length is " + myRectangleArea.GetLength() );

System.out.println(" Area is " + myRectangleArea.Area() );

System.out.println("************************************************************");

} //main

}//class