Re: [問題] Class處理問題請教

[DearKurt ("小朋友"會自己找出路...)]

    public interface A
    {
        int Do(int A1, int A2);

    }

    public class Plus : A
    {
        public Plus()
        { }

        public int Do(int A1, int A2)
        {
            return A1 + A2;
        }
    }

    public class Minus : A
    {
        public Minus()
        { }

        public int Do(int A1, int A2)
        {
            return A1 - A2;
        }
    }


    class Program
    {
        static void Main(string[] args)
        {
            A A1 = new Plus();
            A A2 = new Minus();
            Console.WriteLine(A1.Do(2, 1));
            Console.WriteLine(A2.Do(2, 1));
            Console.ReadLine();
        }
    }

這可能是比較符合物件導向的方法

要不然 最直接的方法

    public class A
    {
        string param;

        public A(string Param)
        {
            param = Param;
        }

        public int Do(int A1, int A2)
        {
            if (param == "MINUS")
                return A1 - A2;
            return A1 + A2;
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            A A1 = new A("PLUS");
            A A2 = new A("MINUS");
            Console.WriteLine(A1.Do(2, 1));
            Console.WriteLine(A2.Do(2, 1));
            Console.ReadLine();
        }
    }

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