控制台应用程序下的计算器(调用子类)

using System;

using System.Collections.Generic;

using System.Linq; using System.Text;

namespace ConsoleApplication1

{    

class Program    

{        

static void Main(string[] args)        

{            

double a = 0;            

double b = 0;            

double c = 0;            

Console.WriteLine("请输入第一个数:");            

a = Convert.ToInt32(Console.ReadLine());            

Console.WriteLine("请输入第二个数:");            

b = Convert.ToInt32(Console.ReadLine());            

Console.WriteLine("请输入运算符号!");            

string hao = Console.ReadLine();            

leiku.fulei fl = gethao(hao);            

fl.a = a;            

fl.b = b;            

c = fl.GetC();            

Console.WriteLine(c);            

Console.ReadKey();        

}        

private static leiku.fulei gethao(string hao)        

{            

leiku.fulei fl = null;            

switch (hao)            

{                

case "+":                    

fl = new leiku.add();                    

break;                

case "-":                    

fl = new leiku.jian();                    

break;                

case "*":                    

fl = new leiku.cheng();                    

break;                

case "/":                    

fl = new leiku.chu();                    

break;                

case "sqrt":                    

fl = new leiku.sqrt();                    

break;                

case "sin":                    

fl = new leiku.sin();                    

break;            

}            

return fl;        

}    

}

}