C# - 繼承性(Inheritance)

學習重點:

• 繼承性的好處 - 減少程式碼的重複性(包含class內部),讓程式碼易於維護

主程式  : 

        private void button1_Click(object sender, EventArgs e)

        {

            Village vi1 = new Village();

            Monster mon1 = new Monster();

            Monster mon2 = new Monster();

            mon1.Attack(vi1);

            mon1.Attack(mon2);

            mon1.Attack(mon2);

            MessageBox.Show("怪物1 HP:" + mon1.GetHP() + "\n" +

                            "怪物2 HP:" + mon2.GetHP() + "\n" +

                            "村民1 HP:" + vi1.GetHP() + "\n");

        }

Creature 類別  :

    class Creature // 基底類別/父類別 (Base Class)

    {

        private int hp = 100;

        public int GetHP()

        {

            return hp;

        }

        public void Injured(int injuredPoint)

        {

            hp -= injuredPoint;

        }

    }

Monster 類別  :

    class Monster : Creature // 衍生類別/子類別(Derived Class) 繼承Creature的屬性與方法

    {

        public void Attack(Creature c) // 不用重複寫多個不同的Attack(XXX)方法

        {

            c.Injured(10);

        }

    }

Village 類別  :

    class Village : Creature // 衍生類別/子類別(Derived Class) 繼承Creature的屬性與方法

    {

        public string Talk()

        {

            return "呵呵";

        }

    }

執行結果: