C# Having trouble with a array

Question

Keep In mind I don't have much coding experience...

I'm having problem's accessing an Array. I'm creating the Array using a function that returns a Array here's an example:

int[] ArrayName = ReturnArray(string);

So now that ArrayName has been created it should be identical to what ReturnArray returned should it not?

Well I set a breakpoint right on :

int[] ArrayName = ReturnArray(string);

I can see that ArrayName was created properly.

Well when I try to access just 1 value of the Array like so:

print(ArrayName[0]);

It should only return the first value in the array right? well It's not! It returns a MORE THAN ONE VALUE and the value's Don't even match what ReturnArray(string) Returned

Here is the "ReturnArray" function :

    public static int[] ReturnArray(string t)
    {
        int i,ii,;
        string ba;
        string base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
        List<int> list = new List<int>();
        for (i = 0; i < t.Length;i++)
        {
            ba = t.Substring(i, 1);
            ii = base64.IndexOf(ba) * 64;
            list.Add(ii);
        }
        return list.ToArray();
    }

Added more code do to response's from comments

    private void outputLoop()
    {
        int i = 0;
            for (i = 0; i < 63; i++)
            {
                int te = lines[i].Length - 128;
                string tes = lines[i].Substring(te, 64);
                int[] ArrayName = ReturnArray(tes);
                _textlayer.DrawString(_font, ArrayName[i].ToString(), new Vector2(1100, i * 15), Color.White);
          }
    }

What your print function do? It is insanely hard to guess on behavior of code the only you can see. Consider making self contained sample (similar to what Tim Medora have in his (+1) answer). Make console project and use Console.WriteLine, add comments on what you gat and what you wxpect (instead all caps "MORE THAN ONE VALUE"). — Alexei Levenkov
– Alexei Levenkov, Commented Aug 31, 2012 at 4:33

Tim M. · Accepted Answer · 2012-08-31 03:20:47Z

2

Here's a working sample. Let's deconstruct.

static void Main( string[] args ) {
    // declare a variable and assign it to the return value of ReturnArray()
    var arr = ReturnArray( "foo" ); 

    // get the first value in the array
    var first = arr[0];
}

public static int[] ReturnArray( string t ) {
    int i, ii;
    string ba;
    string base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
    List<int> list = new List<int>();
    for( i = 0; i < t.Length; i++ ) {
        ba = t.Substring( i, 1 );
        ii = base64.IndexOf( ba ) * 64;
        list.Add( ii );
    }
    return list.ToArray();
}

First, if you are trying to make a base 64 algorithm, it's already been done and in the framework. If you are trying to learn, that's great, but there are examples out there to go on.

ii = base64.IndexOf( ba ) * 64;

Secondly, your code does return what I would expect, i.e. an array of numbers which come from the product of IndexOf() * 64.

This little example yields 1984, 2560, 2560 for "foo" and the value at index 0 is 1984.

"AAA" yields 0, 0, 0, because IndexOf() is 0 * 64.

As you would expect, "BBB" yields 64, 64, 64, because IndexOf() returns 1, and it is multiplied by 64.

More debugging code (based on comments):

int[] arr = ReturnArray( "DADBALAMANAOAAABAYAZAaAbAcAdAeAff/BIBJBKBLBMBNBOBJBKBLBMBNBOBPf/AAABAoApAqArAsAt‌AuAvf/f/+4+5f/f/f/AAABf/B4B5B6DQAZAaAbAcAdAeAZAa" );

// should print "192"
System.Diagnostics.Debug.WriteLine( arr[0] );

edited Aug 31, 2012 at 3:20

answered Aug 31, 2012 at 2:52

Tim M.

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18 Comments

Bryan Over a year ago

In theory you're correct but for some reason It seems to not be functioning correctly for me..

Tim M. Over a year ago

What do you get, i.e. what input yields what result, and how are you outputting that result?

Bryan Over a year ago

DADBALAMANAOAAABAYAZAaAbAcAdAeAff/BIBJBKBLBMBNBOBJBKBLBMBNBOBPf/AAABAoApAqArAsAtAuAvf/f/+4+5f/f/f/AAABf/B4B5B6DQAZAaAbAcAdAeAZAa would be 192,0 ,192 ,64 ,0 ,704 and so on correct? and indeed what it returns is correct...I'm outputting Array[0] with XNA like: _textlayer.DrawString(_font, ArrayName[0].ToString(), new Vector2(1100, x * 15), Color.White);

Tim M. Over a year ago

Those values look correct...what if you use Debug.WriteLine(arr[0])...do you get 192?

Bryan Over a year ago

and it outputs more than just 1 value what is weird though is if i do something like _tilelayer.DrawString(_font, ArrayName[0].ToString(), new Vector2(1100, x * 15), Color.White); _tilelayer.DrawString(_font, ArrayName[1].ToString(), new Vector2(1160, x * 15), Color.White); _tilelayer.DrawString(_font, ArrayName[2].ToString(), new Vector2(1220, x * 15), Color.White); _tilelayer.DrawString(_font, ArrayName[3].ToString(), new Vector2(1280, x * 15), Color.White); and take the first value that is outputted

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