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semester_2/programiranje_2/primeri/Example09/Animal.h

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+
+#ifndef EXAMPLE09_ANIMAL_H
+#define EXAMPLE09_ANIMAL_H
+
+class Animal {   // abstract class
+public:
+    virtual ~Animal() {}
+    virtual void voice() const = 0;   // abstract method
+};
+
+#endif //EXAMPLE09_ANIMAL_H