added oop exercise

submissions/OlStaniev/OOP exercise/index.js

@@ -0,0 +1,42 @@
+class Inhabitants {
+   constructor(name, gender, legs, saying) {
+      this.name = name;
+      this.gender = gender;
+      this.legs = legs;
+      this.saying = saying
+   }
+
+   prepareToPrint() {
+      return [this.name, this.gender, this.legs, this.saying].join(';')
+   }
+}
+
+class People extends Inhabitants {
+   constructor(name, gender, legs, hands, saying) {
+      super(name, gender, legs, saying)
+      this.hands = hands
+   }
+   prepareToPrint() {
+      return [this.name, this.gender, this.legs, this.hands, this.saying].join(';')
+   }
+}
+
+class PeopleWithFriends extends People {
+   constructor(name, gender, legs, hands, saying, friends) {
+      super(name, gender, legs, hands, saying)
+      this.friends = friends
+   }
+   prepareToPrint() {
+      return [this.name, this.gender, this.legs, this.hands, this.saying, this.friends].join(';')
+   }
+}
+
+const dog = new Inhabitants('Bob', 'male', 4, 'woof!')
+const cat = new Inhabitants('Kitty', 'female', 4, 'meow!')
+const woman = new People('Sara', 'female', 2, 2, 'Hello!')
+const catWoman = new People('Bella', 'female', 2, 2, `${cat.saying}`)
+const man = new PeopleWithFriends('Mario', 'male', 2, 2, 'Hi!', ['Bob', 'Tom', 'Eva'])
+
+const inhabitants = [cat, dog, woman, catWoman, man]
+
+inhabitants.forEach(inhabitant => print(inhabitant.prepareToPrint()))