Question

以下是本周C＃Homework的5号草案。我首先使用Linq编写了程序，它工作正常。不幸的是，方向声明我必须创建自己的方法，而不是使用已在Linq中找到的精彩Sum（）方法。这个源代码的主要问题是方法重载是不正确的（并且我的整个Sum（）方法也可能是错误的）。由于我们的全能文本没有清楚地解释如何重载这样的方法，我有点迷失......（或者很多人丢失）。

以下是分配说明（再次）：

“创建一个名为Sum（）的方法，它接受任意数量的整数参数并显示它们的总和。编写一个Main（）方法，演示Sum（）方法在传递一个，三个，五个或一个数组时正确工作10个整数。将程序保存为UsingSum.cs。“

来自Microsoft®VisualC＃®2008，面向对象编程简介，3e，Joyce Farrell

这是我的源代码：

using System;

public class UsingSum
{
    public static void Main()
    {

        //Step 1: Adding 1, 3 and 5

        int[] array1 = { 1, 3, 5 };

        int a;
        int b;
        int c;
        int d;
        int e;
        int f;
        int g;
        int h;
        int i;
        int j;        
        int firstSum;
        int secondSum;

        Console.Write("When the numbers 1, 3 and 5 are added together, using the Sum() method, the answer is: ");

        firstSum = Sum(array1);
        Console.WriteLine("{0}", firstSum);



        //Step 2: Entering variables into Array2[10]


        Console.Write("Enter first integer for addition: ");
        a = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter second integer for addition: ");
        b = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter third integer for addition: ");
        c = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter forth integer for addition: ");
        d = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter fifth integer for addition: ");
        e = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter sixth integer for addition: ");
        f = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter seventh integer for addition: ");
        g = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter eighth integer for addition: ");
        h = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter ninth integer for addition: ");
        i = Convert.ToInt32(Console.ReadLine());
        Console.Write("Enter tenth integer for addition: ");
        j = Convert.ToInt32(Console.ReadLine());

        int[] array2 = { a, b, c, d, e, f, g, h, i, j };

        Console.Write("The total of {0} + {1} + {2} + {3} + {4} + {5} + {6} + {7} + {8} + {9} is: ",
        a, b, c, d, e, f, g, h, i, j);

        secondSum = Sum(array2);
        Console.WriteLine("{0}", secondSum);


    }


//Step 3: Defining the Sum() method

   public static int Sum(int a, int b)

//My overload is generating error CS1501: No overload for method 'Sum' takes '1' arguments

   {

   int sum = 0;
   int[] adder = new int[0];
//designating an array with no parameters...

   for(int a = 0; a < adder.Length; ++a)
      adder[a] = a;

   foreach(int b in adder)
      sum += b;
      Console.WriteLine(" " + sum);
   }
}

Answer 1

您正在定义Sum以获取2个参数

public static int Sum(int a, int b)

但只用1参数调用它

firstSum = Sum(array1);

尝试定义Sum以获取int数组：

public static int Sum(int[] input)

错误CS1501：我没有正确重载Sum（）方法

1 个答案: