Add exams from exam156 to exam199

exam185/throwEx.php

@@ -0,0 +1,12 @@
+<?php 
+
+function divide($num1, $num2){
+    if($num2 == 0){
+        throw new Exception('Cannot devide by 0');
+    } else {
+        return $num1/$num2;
+    }
+}
+
+echo divide(10,0);
+?>

exam185/trycatch.php

@@ -0,0 +1,17 @@
+<?php 
+
+$age = 17;
+
+try {
+
+    if ($age > 18){
+        echo 'Old enough.';
+    } else {
+        throw new Exception('Not old enough');
+    }
+} catch(Exception $ex){
+    echo 'Error: '. $ex -> getMessage();
+}
+
+
+?>