Add exams from exam156 to exam199

exam190/index.php

@@ -0,0 +1,31 @@
+<?php
+
+class BankAccount
+{
+    // modifikatori vidljivosti u PHP public, protected, private
+    public $balance = 42;
+
+    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 - $amount;
+        }
+    }
+}
+
+//nova instanca klase
+$ba = new BankAccount;
+
+
+echo $ba->DisplayBalance();
+
+$ba->Withdraw(50);
+
+echo $ba->DisplayBalance();