static void Main(string[] args) { Console.WriteLine("---简单计算器---"); Console.Write("请输入左值:"); string numLeftStr = Console.ReadLine(); Console.WriteLine(); Console.Write("请输入运算符:"); string oper = Console.ReadLine(); Console.WriteLine(); Console.Write("请输入右值:"); string numRightStr = Console.ReadLine(); double numLeft = 0, numRight = 0; double.TryParse(numLeftStr, out numLeft); double.TryParse(numRightStr, out numRight); IFactory operFactory; switch (oper) { case "+": operFactory = new AddFactory(); break; case "-": operFactory = new SubFactory(); break; case "*": operFactory = new MulFactory(); break; case "/": operFactory = new DivFactory(); break; default: operFactory = new AddFactory(); break; } Operate op = operFactory.CreateOperate(); op.NumLeft = numLeft; op.NumRight = numRight; Console.WriteLine("结果为{0}", op.GetResult()); }
static void Main(string[] args) { Console.WriteLine("请输入第一个数:"); double dNum1 = Convert.ToDouble(Console.ReadLine()); Console.WriteLine("请输入第二个数:"); double dNum2 = Convert.ToDouble(Console.ReadLine()); Console.WriteLine("请输入操作符:"); string strOp = Console.ReadLine(); Factory factory = null; switch (strOp) { case "+": factory = new AddFactory(); break; case "-": factory = new SubFactory(); break; case "*": factory = new MulFactory(); break; case "/": factory = new DivFactory(); break; case "%": factory = new ModuloFactory(); break; default: Console.WriteLine("没有此工厂方法"); factory = null; break; } if (factory != null) { Operation op = factory.CreateOperation(); Console.WriteLine("{0}{1}{2}={3}", dNum1, strOp, dNum2, op.GetResult(dNum1, dNum2)); } }