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C enumerates the differences between permissions |, and |
2020-11-07 16:49:03 【attachment】
using System;
namespace EnumFlags
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Permissions per = Permissions.Insert | Permissions.Update| Permissions.Insert;
Console.WriteLine(per.ToString());
Permissions allP = (Permissions)Enum.Parse(typeof(Permissions),"3");
Console.WriteLine(allP);
Permissions pers = Permissions.Update;
if ((pers & Permissions.Insert) == Permissions.Insert)
{
Console.WriteLine("hava");
}
if (pers.HasFlag(Permissions.Insert))
{
Console.WriteLine("hava");
}
Console.WriteLine(1 | 2); // 01 | 10 => 11 (3)
Console.WriteLine(2 | 4); // 010 | 100 => 110 (6)
Console.WriteLine(2 | 2);
Console.WriteLine(1 & 2); // 01 & 10 => 00 (0)
Console.WriteLine(2 & 4); // 010 & 100 => 000 (0)
Console.WriteLine(2 & 2);
Console.WriteLine(1 ^ 2); // 01 ^ 10 => 11 (3)
Console.WriteLine(2 ^ 4); // 010 ^ 100 => 110 (6)
Console.WriteLine(2 ^ 2);
Console.WriteLine(condition1() | condition2() | condition3() | condition4());
Console.WriteLine("|");
Console.WriteLine(condition1() || condition2() || condition3() || condition4());
Console.WriteLine("||");
Console.WriteLine(condition1() & condition2() & condition3() & condition4());
Console.WriteLine("&");
Console.WriteLine(condition1() && condition2() && condition3() && condition4());
Console.WriteLine("&&");
}
static bool condition1()
{
Console.WriteLine("condition1()...");
return true; // perhaps false
}
static bool condition2()
{
Console.WriteLine("condition2()...");
return false; // perhaps true
}
static bool condition3()
{
Console.WriteLine("condition3()...");
return true; // perhaps false
}
static bool condition4()
{
Console.WriteLine("condition4()...");
return false; // perhaps true
}
[Flags]
public enum Permissions
{
Insert = 1,
Delete = 2,
Update = 4,
Query = 8
}
}
}
https://www.cnblogs.com/itsone/p/10310644.html
https://www.cnblogs.com/steden/p/4605768.html
https://zhuanlan.zhihu.com/p/94590467
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