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POChanging integer bits
 

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    <p>Ok, I have N = integer, P = position,V = 0 or 1 I have to change the bit at position P of integer N with the value V <br/> I'm trying with <br/> N = 5 (101)<br/> P = 2 (takes the 1)<br/> V = 0 (has to make it a zero)<br/> and the result is 97 (1100 0001) (should be 0000 0001) I think the problem is from the mask because when I write it in the console its -5 (as it should be) but if I parse it, to see its bits I get an error (overflow)<br/> the program is in the making so I'm currently working on <strong>V = 0</strong> so don't try with 1 <br/>Yesterday I posted a question and a lot of people posted sh*t like "this is not a question - you want us to solve u your problem"<br/> - No, I don't want you to solve me the problem I want to know <strong>why after int result = mask &amp; integerBinary; I get 97 and not 1</strong></p> <pre><code>using System; class ChangeBit { static void Main() { Console.Write("(n) Type an integer: "); string integerLine = Console.ReadLine(); // Read string from console Console.Write("(p) Type position: "); string positionLine = Console.ReadLine(); // Read string from console Console.Write("(v) Type 0 or 1: "); string valueLine = Console.ReadLine(); // Read string from console int value; int integer; int position; if (int.TryParse(integerLine, out integer) &amp;&amp; int.TryParse(positionLine, out position) &amp;&amp; int.TryParse(valueLine, out value)) // Try to parse the strings as integers { int integerBinary = int.Parse(Convert.ToString(integer, 2)); int bitValue = ((1 &lt;&lt; position) &amp; integerBinary) &gt;&gt; position; int mask = ~(1 &lt;&lt; position); if (value==0) { int result = mask &amp; integerBinary; Console.WriteLine("(n) After bit conversion = {0}", result); } else Console.WriteLine("(n) After bit conversion = {0}", integer); } else { Console.WriteLine("Invalid input."); } } } </code></pre>
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    1. USИван Божков
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    1. COkkokosa beat me to answering this, he is absolutely correct. You should also start using the debugger and step through your programs, this makes the problems way more obvious. Also your Algorithm is way overcomplicated, its like travelling from NY to LA via Tokyo. Try to reduce the code to the necessary only.
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      1. USXaser
    2. COYou should use BitArray to do your stuff. Will be much easier to understand and maintain.
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      1. USArnaud F.
    3. COYou seem confused about binary stuff. If you want, I can teach you about it (for free, of course). Drop by on #omnimaga on efnet, and I'll do my best to teach you the basics.
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      1. USharold
 

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