C#篇(1)——C#占位符的使用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;//引用命名空间

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //占位符
            int a, b, c;
            a = 10;
            b = 20;
            c = 30;
            Console.WriteLine("{0}n{1}n{2}",a,b,c);//输出为10 20 30
            Console.ReadKey();
            Console.WriteLine("{0}n{2}n{1}",a,b,c);//输出为10 30 20
            Console.ReadKey();
            Console.WriteLine("{0}n{1}n{2}",c,b,a);//输出为30 20 10
            Console.ReadKey();
        }
    }
}