Exemplo n.º 1
0
 static void Main(string[] args)
 {
     //虚方法、抽象类、接口
     //面向对象计算器 案例
     while (true)
     {
         Console.WriteLine("请输入第一个数字");
         double n1 = Convert.ToDouble(Console.ReadLine());
         Console.WriteLine("请输入第二个数字");
         double n2 = Convert.ToDouble(Console.ReadLine());
         Console.WriteLine("请输入运算符");
         string    opera = Console.ReadLine();
         CalFather cal   = GetCal(opera, n1, n2);
         double    res   = cal.GetResult();
         Console.WriteLine(res);
         Console.ReadKey();
     }
 }
Exemplo n.º 2
0
        public static CalFather GetCal(string opear, double n1, double n2)
        {
            CalFather cal = null;

            switch (opear)
            {
            case "+": cal = new Add(n1, n2);
                break;

            case "-": cal = new Sub(n1, n2);
                break;

            case "*": cal = new Cheng(n1, n2);
                break;

            case "/": cal = new Chu(n1, n2);
                break;
            }
            return(cal);
        }