Exemple #1
0
        static void Main(string[] args)
        {
            Operation oper = null;

            oper         = OperationFactory.createOperate("+");
            oper.NumberA = 1;
            oper.NumberB = 2;
            double result = oper.GetResult();

            Console.WriteLine(result);
            Console.ReadLine();
        }
Exemple #2
0
        static void Main(string[] args)
        {
            #region 过程式
            //Console.WriteLine("请输入数字A: ");
            //string A = Console.ReadLine();
            //Console.WriteLine("请选择运算符号(+、-、*、/): ");
            //string B = Console.ReadLine();
            //Console.WriteLine("请输入数字B: ");
            //string C = Console.ReadLine();
            //string D = "";

            //if (B == "+")
            //{
            //    D = Convert.ToString(Convert.ToDouble(A) + Convert.ToDouble(C));
            //}
            //if (B == "-")
            //{
            //    D = Convert.ToString(Convert.ToDouble(A) - Convert.ToDouble(C));
            //}
            //if (B == "*")
            //{
            //    D = Convert.ToString(Convert.ToDouble(A) * Convert.ToDouble(C));
            //}
            //if (B == "/")
            //{
            //    D = Convert.ToString(Convert.ToDouble(A) / Convert.ToDouble(C));
            //}

            //Console.WriteLine("结果是: " + D);
            //Console.ReadKey();
            #endregion

            #region 修改后的过程式
            //try
            //{
            //    Console.WriteLine("请输入数字A: ");
            //    string strNumberA = Console.ReadLine();
            //    Console.WriteLine("请选择运算符号(+、-、*、/): ");
            //    string strOperate = Console.ReadLine();
            //    Console.WriteLine("请输入数字B: ");
            //    string strNumberB = Console.ReadLine();
            //    string strResult = "";

            //    switch (strOperate)
            //    {
            //        case "+":
            //            strResult = Convert.ToString(Convert.ToDouble(strNumberA) + Convert.ToDouble(strNumberB));
            //            break;
            //        case "-":
            //            strResult = Convert.ToString(Convert.ToDouble(strNumberA) - Convert.ToDouble(strNumberB));
            //            break;
            //        case "*":
            //            strResult = Convert.ToString(Convert.ToDouble(strNumberA) * Convert.ToDouble(strNumberB));
            //            break;
            //        case "/":
            //            strResult = Convert.ToString(Convert.ToDouble(strNumberA) / Convert.ToDouble(strNumberB));
            //            break;
            //        default:
            //            break;
            //    }

            //    Console.WriteLine("结果是: " + strResult);
            //    Console.ReadKey();
            //}
            //catch (Exception ex)
            //{
            //    Console.WriteLine("您的输入有错: " + ex.Message);
            //    throw;
            //}
            #endregion


            #region 使用面向对象类
            //try
            //{
            //    Console.WriteLine("请输入数字A: ");
            //    string strNumberA = Console.ReadLine();
            //    Console.WriteLine("请选择运算符号(+、-、*、/): ");
            //    string strOperate = Console.ReadLine();
            //    Console.WriteLine("请输入数字B: ");
            //    string strNumberB = Console.ReadLine();
            //    string strResult = "";
            //    strResult = Convert.ToString(Operate.GetResult(Convert.ToDouble(strNumberA), Convert.ToDouble(strNumberB), strOperate));

            //    Console.WriteLine("结果是: " + strResult);
            //    Console.ReadKey();
            //}
            //catch (Exception ex)
            //{
            //    Console.WriteLine("您的输入有错: " + ex.Message);
            //    throw;
            //}
            #endregion


            #region 使用松耦合类 + 简单工厂
            try
            {
                Console.WriteLine("请输入数字A: ");
                string strNumberA = Console.ReadLine();
                Console.WriteLine("请选择运算符号(+、-、*、/): ");
                string strOperate = Console.ReadLine();
                Console.WriteLine("请输入数字B: ");
                string strNumberB = Console.ReadLine();

                Operation oper;
                oper         = OperationFactory.createOperate(strOperate);
                oper.NumberA = Convert.ToDouble(strNumberA);
                oper.NumberB = Convert.ToDouble(strNumberB);
                string result = Convert.ToString(oper.GetResult());

                Console.WriteLine("结果是: " + result);
                Console.ReadKey();
            }
            catch (Exception ex)
            {
                Console.WriteLine("您的输入有错: " + ex.Message);
                Console.ReadKey();
            }
            #endregion
        }