[Mono-list] Some C# problems

[Simon Waite]

I can confim that it's an issue under mono/mint and it's not a compiler
problem.

D:\project\mono>csc kentest.cs
Microsoft (R) Visual C# .NET Compiler version 7.00.9466
for Microsoft (R) .NET Framework version 1.0.3705
Copyright (C) Microsoft Corporation 2001. All rights reserved.


D:\project\mono>kentest
Welcome to Tic Tac Toe
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........

D:\project\mono>

-------------------------------------------------------------------
under mono 0.13

demo@gemini:/tmp$ mcs kentest.cs
Compilation succeeded

demo@gemini:/tmp$ mono kentest.exe
Welcome to Tic Tac Toe
** (process:18901): WARNING **: unhandled exception
System.NullReferenceException: "A null value was found where an object
instance was required"
in (unmanaged) (managed to native wrapper) System.Array:GetLength (int)
in <0x00004> (managed to native wrapper) System.Array:GetLength (int)
in <0x00079> .Board:.ctor (int)
in <0x0005c> .TicTacToe:Main ()

and

demo@gemini:/tmp$ mint kentest.exe
Welcome to Tic Tac Toe
** (process:19194): WARNING **: unhandled exception
System.NullReferenceException: "Segmentation fault"
TODO: implement stack traces


-------------------------------------------------------------------
(after scping the VS exe to /tmp )

demo@gemini:/tmp$ mono kentest.exe
Welcome to Tic Tac Toe
** (process:19062): WARNING **: unhandled exception
System.NullReferenceException: "A null value was found where an object
instance was required"
in (unmanaged) (managed to native wrapper) System.Array:GetLength (int)
in <0x00004> (managed to native wrapper) System.Array:GetLength (int)
in <0x00097> .Board:.ctor (int)
in <0x0005c> .TicTacToe:Main ()

-------------------------------------------------------------------
(after scping the MCS exe to windows
D:\project\mono>kentest
Welcome to Tic Tac Toe
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........

D:\project\mono>
-------------------------------------------------------------------


----- Original Message -----
From: "Kenneth Christiaansen" <kenneth@gnu.org>
To: <mono-list@ximian.com>
Sent: Monday, August 05, 2002 11:48 PM
Subject: [Mono-list] Some C# problems


> He everyone,
>
> I am having some problems with the attached code. This is the first I play
> with C# so it might include sillynesses. It compiles fine, but I get the
> following failures while running the code:
>
> ** (process:31789): WARNING **: unhandled exception
> System.NullReferenceException: "A null value was found where an object
> instance was required"
> in (unmanaged) (managed to native wrapper) System.Array:GetLength (int)
> in <0x00004> (managed to native wrapper) System.Array:GetLength (int)
> in <0x00079> .Board:.ctor (int)
> in <0x0005c> .TicTacToe:Main ()
>
> So if anyone can give me a hint on what I am doing wrong, or tell me this
is
> a bug, then please feel free doing so.
>
> Cheers, Kenneth
>
>
> using System;
>
> class TicTacToe {
>
>  class Board {
>   enum Block {
>    Circle,
>    Cross,
>    None,
>   };
>
>   private Block [,] board;
>
>   public Board (int size)
>   {
>    board = new Block [size, size];
>
>    for (int i = 0; i < board.GetLength (0); i++) {
>     for (int j = 0; j < board.GetLength (1); j++) {
>      board [i, j] = Block.None;
>     }
>    }
>   }
>
>   public void DrawBoard ()
>   {
>    for (int i = 0; i < board.GetLength (0); i++) {
>     for (int j = 0; j < board.GetLength (1); j++) {
>      switch (board [i, j])
>      {
>      case Block.None:
>       Console.Write (".");
>       break;
>      case Block.Cross:
>       Console.Write ("X");
>       break;
>      case Block.Circle:
>       Console.Write ("O");
>       break;
>      }
>     }
>     Console.WriteLine ("");
>    }
>   }
>  }
>
>  static public void Main ()
>  {
>   Console.WriteLine ("Welcome to Tic Tac Toe");
>   Board board = new Board (10);
>   board.DrawBoard ();
>  }
> }
>
>
>
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