W3School TIY Editor

using System;

​

namespace MyApplication

{

  class Program

  {

    static void Main(string[] args)

    {

      int myInt = 9;

      double myDouble = myInt;  // 自动类型转换：从 int 到 double

​

      Console.WriteLine(myInt);

      Console.WriteLine(myDouble);

    }

  }

}