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标题: C# 问题帮我看看哪里出错！ [打印本页]

作者: 我是大猪头 时间: 2009-7-6 04:57 PM
标题: C# 问题帮我看看哪里出错！
计算的部分

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{

      public class Operation
      {
         private double _numberA = 0;
         private double _numberB = 0;

         public double NumberA
         {
            get { return _numberA; }
            set { _numberA = value; }

         }

         public double NumberB
         {
            get { return _numberB; }
            set { _numberB = value; }

         }

         public virtual double GetResult()
         {
            double result = 0;
            return result;
         }

      }

      class OperationAdd : Operation
      {
         public override double GetResult()
         {
            double result = 0;
            result = NumberA + NumberB;
            return result;

         }
      }

      class OperationSub : Operation
      {
         public override double GetResult()
         {
            double result = 0;
            result = NumberA - NumberB;
            return result;

         }
      }

      class OperationMul : Operation
      {
         public override double GetResult()
         {
            double result = 0;
            result = NumberA * NumberB;
            return result;
         }
      }

      class OperationDiv : Operation
      {
         public override double GetResult()
         {
            double result = 0;
            if (NumberB == 0)
            {
                  throw new Exception("Number B cannot be 0");
            }

            result = NumberA / NumberB;

            return result;
         }
      }

      public class OperationFactory
      {
         public static Operation CreateOperate(string operate)
         {
            Operation ope = null;
            switch (operate)
            {
                  case "+":
                     ope = new OperationAdd();
                     break;

                  case "-":
                     ope = new OperationSub();
                     break;

                  case "*":
                     ope = new OperationMul();
                     break;

                  case "/":
                     ope = new OperationDiv();
                     break;

            }
            return ope;

         }

      }

}

client 部分

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
class watever
{
      static void Main(string[] args)
      {
         try
         {
            Console.Write("please insert value A");
            string NumberA = Console.ReadLine();
            Console.Write("please insert a calculation method(+,-,*,/)");
            string operate = Console.ReadLine();
            Console.Write("please insert value B");
            string NumberB = Console.ReadLine();
            string result = "";
            result = Convert.ToString(Operation.GetResult(Convert.ToDouble(NumberA), Convert.ToDouble(NumberB), operate));
            Console.Write("the result is " + result);
            Console.ReadLine();

         }
         catch (Exception ex)
         {
            Console.Write("invalid insert asdasdasdasddddssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss"+ex.Message);
         }
      }

}
}

我看了很久看不出哪里错，请各位高手帮忙解围

error message:Error 1 No overload for method 'GetResult' takes '3' arguments C:\Documents and Settings\Kang\Desktop\testing\ConsoleApplication1\ConsoleApplication1\Class2.cs 21 43 ConsoleApplication1

[ 本帖最后由我是大猪头于 2009-7-6 06:40 PM 编辑 ]

作者: Super-Tomato 时间: 2009-7-6 06:00 PM

原帖由 我是大猪头 于 2009-7-6 04:57 PM 发表
计算的部分

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{

      public class Operation
      {
         ...

你的錯誤訊息是告訴你找不到並擁有3個參數的 GetResult 函數, 那麼你得看看是不是你的 internal 造成
雖然沒用 C#, 但是 internal 感覺像是 private 不允許 class 以外使用

public virtual double GetResult()
{
double result = 0;
return result;
}
internal static double GetResult(double p, double p_2, string operation)
{
throw new NotImplementedException();
}
......
result = Convert.ToString(Operation.GetResult(Convert.ToDouble(NumberA), Convert.ToDouble(NumberB), operate));

复制代码

作者: 我是大猪头 时间: 2009-7-6 06:44 PM
改成public也是不可以

而且我的private number_A和number_B都是调给在同个class里面的NumberA和NumberB所以应该是没问题的吧

作者: Super-Tomato 时间: 2009-7-6 07:17 PM

原帖由 我是大猪头 于 2009-7-6 06:44 PM 发表
改成public也是不可以
而且我的private number_A和number_B都是调给在同个class里面的NumberA和NumberB所以应该是没问题的吧

你現在修改的 coding 已經去掉了 GetResult(......) 但看看你的 Main 中卻沒有修改對應的 GetResult

作者: goodday 时间: 2009-7-7 11:26 AM

class OperationDiv : Operation
{
public override double [color=Red]GetResult( int X，int y, int z)[/color] {
double result = 0;
if (NumberB == 0)
{
throw new Exception("Number B cannot be 0");
}
result = NumberA / NumberB;
return result;
}
}

复制代码

Convert.ToString(Operation.GetResult(Convert.ToDouble(NumberA), Convert.ToDouble(NumberB), operate));

你没传parameter

作者: conan0524 时间: 2009-7-19 08:08 PM

class OperationAdd : Operation
{
public override double [color=Red]GetResult()[/color]
{
double result = 0;
result = NumberA + NumberB;
return result;
}
}
class OperationSub : Operation
{
public override double [color=Red]GetResult()[/color]
{
double result = 0;
result = NumberA - NumberB;
return result;
}
}
class OperationMul : Operation
{
public override double [color=Red]GetResult()[/color]
{
double result = 0;
result = NumberA * NumberB;
return result;
}
}
class OperationDiv : Operation
{
public override double [color=Red]GetResult()[/color]
{
double result = 0;
if (NumberB == 0)
{
throw new Exception("Number B cannot be 0");
}
result = NumberA / NumberB;
return result;
}
}

复制代码

上面四个GETRESULT()应该改成GETRESULT(double NUMBERA, double NUMBERB)
因为：
result = Convert.ToString(Operation.GetResult(Convert.ToDouble(NumberA), Convert.ToDouble(NumberB), operate));

作者: 我是大猪头 时间: 2009-8-7 03:43 PM

原帖由 conan0524 于 2009-7-19 08:08 PM 发表
class OperationAdd : Operation
      {
         public override double GetResult()
         {
            double result = 0;
            result = NumberA + NumberB;
      ...

感谢你的回答丫

作者: goodday 时间: 2009-8-14 12:08 AM
呵呵
有人看大话设计模式

page 9 page 10 的 code

作者: 我是大猪头 时间: 2009-8-14 02:39 PM
-.-
ohh,被抓到

作者: goodday 时间: 2009-8-14 02:57 PM
你有钱和前途啦
研究了什么快分享出来

作者: 我是大猪头 时间: 2009-8-14 11:50 PM

原帖由 goodday 于 2009-8-14 02:57 PM 发表
你有钱和前途啦
研究了什么快分享出来

我只是穷书生一名

没研究到什么啦

还需要多多学习

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