(C#) enum

Keyword to define an enumeration.

Values can be easily converted to ?string using the ToString() method.

Simple example

This code shows how to use and display enumeration values

using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication1
{
    class Program
    {
        //The enumeration
        enum MyEnum { paper, rock, scissors }
        static void Main()
        {
            //Show the three enumation values on screen without using a cast
            const MyEnum myPaper = MyEnum.paper;
            const MyEnum myRock = MyEnum.rock;
            const MyEnum myScissors = MyEnum.scissors;
            Console.WriteLine(myPaper.ToString() + '\t' + myRock.ToString() + '\t' + myScissors.ToString());
            //Show the three enumation values on screen using a cast
            for (int i = 0; i < 3; ++i)
            {
                MyEnum myEnum = (MyEnum)i;
                Console.Write(myEnum.ToString() + '\t');
            } 
            //Wait for key input
            Console.ReadLine();
        }
    }
}

Paper-rock-scissors example

In this example below, a paper-rock-scissors game is player. The enumeration consists of paper, rock and scissors.

using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication1
{
    class Program
    {
        enum myEnum { paper, rock, scissors }
        static void Main()
        {
            
            //Create instance of Random
            Random myRandom = new Random();
            //What do the players play?
            myEnum player1 = (myEnum) myRandom.Next(3);
            myEnum player2 = (myEnum) myRandom.Next(3);
            Console.WriteLine("Player #1 plays: " + player1.ToString());
            Console.WriteLine("Player #2 plays: " + player2.ToString());
            //What is the outcome of the fight?
            if (player1==player2)
            {
                Console.WriteLine("Draw!");
            }
            else if ( 
                   (player1==myEnum.paper    && player2==myEnum.rock)
                || (player1==myEnum.rock     && player2==myEnum.scissors)
                || (player1==myEnum.scissors && player2==myEnum.paper))
            {
                Console.WriteLine("Player #1 won!");
            }
            else
            {
                Console.WriteLine("Player #2 won!");
            }
            //Wait for key input
            Console.ReadLine();
        }
    }
}

'enum' links

Code links

last edited (March 8, 2007) by bilderbikkel, Number of views: 2279, Current Rev: 5 (Diff)

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