如何使用Linq找到完美的数字 [英] How Do I Find Perfect Number Using Linq

问题描述

嗨......我刚刚完成了一个代码，在C＃中找到一个完美的数字..但它的冗长...所以我想开发这个使用Linq ...在这里我添加了我的代码...请帮助我..

Hi...I just done a code to find a perfect number in C#..But its lengthy...So i want to develop this Using Linq...Here i added my code also...Please Help me..

static void Main(string[] args)
        {
            int number, sumofnumbers, i;
            Console.WriteLine("hello");
            for (number = 2; number <= 100000; number++)
            {
                i = 1;
                sumofnumbers = 0;
                while (i < number)
                {

                    if (number % i == 0)
                        sumofnumbers = sumofnumbers + i;
                    i++;
                }
                if (sumofnumbers == number)
                    Console.WriteLine("perfect number is " + number);
            }
        }

提前致谢

Thanks in advance

推荐答案

怎么样：

How about:

IEnumerable<int> perfectNumbers = Enumerable.Range(2, 100000)
    .Where(number => Enumerable.Range(1, number - 1).Where(i => (number % i) == 0).Sum() == number);

foreach (int number in perfectNumbers)
{
    Console.WriteLine("perfect number is " + number);
}

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