C# - 類別(class)

學習重點:

• 類別(class)的屬性(property)與方法(method)

主程式:       

        private void button1_Click(object sender, EventArgs e)

        {

            Student s1 = new Student(); // 建立物件s1

            s1.grade = 5;

            s1.name = "小王";           

            Student s2 = new Student(); // 建立物件s2

            s2.grade = 3;

            s2.name = "小三";           

            s1.upgrade();

            MessageBox.Show(s1.say()); 

            MessageBox.Show(s2.together(s1));

        }

Student 類別:

    class Student

    {

        //屬性

    public int grade;

    public String name;

        //方法1- 自我介紹

        public String say()

        {

            return "我叫" + name + ",年級為" + grade;

        }

        //方法2- 分組

        public string together(Student s)

        {

            return grade + "年級的" + name + "與" + s.grade + "年級的" + s.name + "分為同一組";

        }

        //方法3年- 年級數+1

        public void upgrade() { grade++; }

    }

類別建立方法:

執行結果: