c# - 仅从参数数组中调用某些值的总和

Question

我试图弄清楚如何从参数数组中调用 10 以下的所有值的总和。

到目前为止，我已经弄清楚如何调用值的值。关于我如何/应该得到这个数字的任何想法？

static int SumVals(params int[] vals)//parameter array
    {
        int sum = 0;
        foreach (int val in vals) //for each integer value 
        {
            sum += val; //sum equals sum plus val. returns all values added together
        }
        return sum;
    }

    static void Main(string[] args)
    {
        int sum = SumVals(100, 5, 2, 9, 800);
        Console.WriteLine("Summed Values = {0}", sum);
        Console.ReadKey();
    }

Answer 1

在循环中添加 if 语句以仅添加 < 10 的值

foreach (int val in vals)
{
    if(val < 10)
    {
        sum += val;
    }
}

Answer 2

这是你想要做的吗？

static int SumVals(params int[] vals)
{
    return vals.Where(i => i < 10).Sum();
}

Answer 3

static int SumVals(params int[] vals)//parameter array
    {
        int sum = 0;
        foreach (int val in vals) //for each integer value 
        {
            if(val < 10) //only add to the sum if value is less than 10
                 sum += val; //sum equals sum plus val. returns all values added together
        }
        return sum;
    }

    static void Main(string[] args)
    {
        int sum = SumVals(100, 5, 2, 9, 800);
        Console.WriteLine("Summed Values = {0}", sum);
        Console.ReadKey();
    }

Answer 4

    foreach (int val in vals) //for each integer value 
    {
        if(val <10)
         sum += val; //sum equals sum plus val. returns all values added together
    }

Answer 5

您可以使用 LINQ 来做到这一点：

static int SumVals(params int[] vals)//parameter array
{
    return vals.Where(v => v < 10).Sum();
}

您必须将其放在using System.Linq;文件的顶部才能使其正常工作。

Answer 6

怎么样：

static int SumVals(params int[] vals)//parameter array
    {
        int sum = 0;
        foreach (int val in vals) //for each integer value 
        {
            if (val >=10) continue;
            sum += val; //sum equals sum plus val. returns all values added together
        }
        return sum;
    }

Answer 7

static int SumVals(params int[] vals)//parameter array
{
     return vals.Where(x => x < 10).Sum();
}