C# 输入输出格式

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            //输入单个字符
            string s = Console.ReadLine();
            int x = Convert.ToInt32(s);
            Console.WriteLine("x={0}", x);
            //输入多个数据
            s = Console.ReadLine();
            string[] s2 = s.Split(" ");
            double[] a = new double[s2.Length];
            double sum = 0;
            for (int i = 0; i < s2.Length; i++)
            {
                a[i] = Convert.ToInt32(s2[i]);
                sum = sum + a[i];
            }
            //带格式输入输出
            Console.WriteLine("和是{0},平均是{1}", sum,sum/s2.Length);
        }
    }
}