60 lines
1.7 KiB
C#
60 lines
1.7 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Runtime.InteropServices;
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using System.Numerics;
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using System.Collections;
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namespace ConsoleApplication666
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{
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class Program
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{
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[DllImport("kernel32.dll")]
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private static extern void GetSystemTimePreciseAsFileTime(out long fileTime);
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// 将 FILETIME (long) 转换为 DateTime
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public static DateTime GetNowPrecise()
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{
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long fileTime;
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GetSystemTimePreciseAsFileTime(out fileTime);
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DateTime localTime = DateTime.FromFileTimeUtc(fileTime).ToLocalTime();
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return localTime;
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}
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static void Main(string[] args)
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{
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BigInteger hugeNumber = BigInteger.Parse("1234567890123456789012345678901234567890");
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var H= hugeNumber.ToByteArray();
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BitArray bi = new BitArray(H);
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// 从字节数组创建
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byte[] bytes = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
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BigInteger fromBytes = new BigInteger(bytes);
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// 基本运算
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BigInteger sum = hugeNumber + 1;
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BigInteger product = hugeNumber * 2;
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Console.WriteLine("大数字: {0}", hugeNumber);
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Console.WriteLine("加1: {0}", sum);
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Console.WriteLine("乘2: {0}", product);
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// 比较操作
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if (hugeNumber > BigInteger.Parse("100000000000000000000"))
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{
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Console.WriteLine("这是一个非常大的数字");
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}
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DateTime ddd = GetNowPrecise();
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string tii = ddd.ToString("yyyy-MM-dd HH:mm:ss.ffffff");
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Console.WriteLine(tii);
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Console.ReadLine();
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}
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}
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}
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