C#_变长参数

使用params关键字进行变长参数的使用。

namespace project2
{
    enum cafe
    {
        big_cup,
        mid_cup,
        sma_cup,
    }
    class Program
    {
        static void Main(string[] args)
        {
            int a = 10;
            int b = 13;
            int c = 100;
            int sum1,sum2;
            sum1 = Sum(a, b);
            sum2 = Sum(a, b, c);
            Console.WriteLine(sum1);
            Console.WriteLine(sum2);

        }
        static int Sum(params int[] arr)
        {
            int sum=0;
            for(int i = 0; i < arr.Length; i++)
            {
                sum = sum + arr[i];
            }
            return sum;
        }
    }
}