📅  最后修改于: 2022-03-11 14:49:20.031000             🧑  作者: Mango
using System;
public class Program
{
public static void Main(string[] args)
{
#if (!pi)
Console.WriteLine("i");
#else
Console.WriteLine("PI undefined");
#endif
Console.WriteLine("ok");
Console.ReadLine();
}
}