public static void main(String[] args) {
//  Operation oper;
//  oper=OperationFactory.createOperate('+');
//  System.out.println("請輸入_numberA:");
//  Scanner s = new Scanner(System.in);
//  oper.setNumberA(s.nextDouble());
//  System.out.println("請輸入_numberB:");
//  oper.setNumberB(s.nextDouble());
//  double result = oper.getResult();
//  System.out.println("結果是："+result);
  
//  
//  Operation oper;
//  Scanner s = new Scanner(System.in);
//  System.out.println("請輸入運算子（+ - * /）:");
//  String operChar = s.next();
//  switch(operChar){
//   case "+" : oper = new OperationAdd();
//   case "-" : oper = new OperationSub();
//   case "*" : oper = new OperationMul();
//   case "/" : oper = new OperationDiv();
//   default:
//   oper = new OperationAdd();
//  }
//  System.out.println("請輸入_numberA:");
//  oper.setNumberA(s.nextDouble());
//  System.out.println("請輸入_numberB:");
//  oper.setNumberB(s.nextDouble());
//  double result = oper.getResult();
//  System.out.println("計算結果是："+result);
//  s.close();
//  
//  System.out.println("請輸入_numberA:");
//  Scanner s = new Scanner(System.in);
//     int num1 = s.nextInt();
//  System.out.println("請輸入_numberB:");
//  int num2 = s.nextInt();
//  System.out.println("請輸入運算子（+ - * /）:");
//  String oper = s.next();
//  switch(oper){
//  case "+" : System.out.println(num1+num2);
//  case "-" : System.out.println(num1-num2);
//  case "*" : System.out.println(num1*num2);
//  case "/" : System.out.println(num1/num2);
//  case "%" : System.out.println(num1%num2);
//  }
 }