Add exams from exam156 to exam199

exam196/index.php

@@ -0,0 +1,43 @@
+<?php
+
+class BankAccount
+{
+    // modifikatori vidljivosti u PHP public, protected, private
+    public $balance = 0;
+
+    public function DisplayBalance()
+    {
+        return 'Balance: ' . $this->balance . '<br>'; // Ovako pristupamo vrednosti balance 'pravimo referencu'
+    }
+
+    public function Withdraw($amount)
+    {
+        if ($this->balance < $amount) {
+            echo 'Not enough money <br> ';
+        } else {
+            $this->balance = $this->balance - $amount;
+        }
+    }
+
+    public function Deposit($amount){
+        $this->balance = $this->balance + $amount;
+    }
+}
+
+//Multiple instances of class :
+$alex = new BankAccount;
+$billy = new BankAccount;
+
+$alex -> Deposit(100);
+$billy -> Deposit(50);
+
+$alex -> Withdraw(98);
+$billy -> Withdraw(12.5);
+
+echo $alex -> DisplayBalance();
+echo $billy -> DisplayBalance();
+
+
+
+
+?>