add topic_5

topic_5/example1/script.js

@@ -0,0 +1,31 @@
+function Animal(name, energy) {
+    let obj = Object.create(Animal.prototype);
+    obj.name = name;
+    obj.energy = energy;
+    return obj;
+}
+
+Animal.prototype.eat = function (amount) {
+    console.log(`${this.name} is eating.`);
+    this.energy += amount;
+}
+
+Animal.prototype.sleep = function (length) {
+    console.log(`${this.name} is sleeping.`);
+    this.energy += length;
+}
+
+Animal.prototype.play = function (length) {
+    console.log(`${this.name} is playing.`);
+    this.energy -= length;
+}
+
+const leo = Animal("Leo", 7);
+leo.sleep(8);
+leo.eat(2);
+leo.play(10);
+
+const bob = Animal("Bob", 3);
+bob.sleep(8);
+bob.eat(2);
+bob.play(10);