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Codecademy.playground/Pages/Classes - are reference types.xcplaygroundpage/Contents.swift

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+
+class Order {
+  var items = [""]
+  var subtotal = 0.0
+  var tip = 0.0
+  var total = 0.0
+
+  init(items: [String], subtotal: Double, tip: Double, total: Double) {
+    self.items = items
+    self.subtotal = subtotal
+    self.tip = tip
+    self.total = total
+  }
+}
+
+var order1 = Order(items: ["Chili Fries", "Lemonade"], subtotal: 8.75, tip: 2.0, total: 12.75)
+
+
+var order8 = order1
+order8.total = 0.0
+
+print(order1.total)
+print(order8.total)