Slip 3 - A) Write a Calculator class that can accept two values, then add, subtract, multiply them or divide them on request. For example: $calc = new Calculator( 3, 4 ); echo $cale- >add(); // Displays “7” echo $calce- >multiply(); // Displays “12”

 Solution:

<?php

class Calculate

      {public $a;

public $b;

function __construct($a,$b){

$this->a=$a;

$this->b=$b;

}

public function add()

         {

          $c=$this->a+$this->b;

echo"Addition = $c<br>";

         }

public function subtract()

         {

          $c=$this->a-$this->b;

echo"Subtract = $c<br>";

         }

public function multiply()

         {

          $c=$this->a*$this->b;

echo"Multiplication = $c<br>";

         }

public function div()

         {

          $c=$this->a/$this->b;

echo"Division = $c";

         } }

//$x=$_GET['a'];

//$y=$_GET['b'];

$calc=new Calculate(4,3);

$calc->add();

$calc->subtract();

$calc->multiply();

$calc->div();?>