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POIndex out of bounds exception in homework
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  1. POIndex out of bounds exception in homework
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    copied!<p>I'm trying to do a homework assignment. I have to use dynamic programming to display whether the next person to move is in a win/loss state. I don't need help with the actual problem, I need help with an index out of bounds exception I'm getting that baffles me. I'm only going to paste part of my code here, because I only need the for loops looked at. I also don't want anyone in my class seeing all my code and copying it. If you need more data please let me know. So here is the code:</p> <pre><code>if(primeArray[x] == true){ for(int i = 1; i &lt;= x; i++){ if(primeArray[i]== true){ newRowNumber = x - i; } if(dynaProgram[newRowNumber][columnNumber] &lt; minimum){ minimum = dynaProgram[newRowNumber][columnNumber]; } } } //COMPOSITE CASE FOR X! else{ for(int k = 1; k &lt;= x; k++){ if((primeArray[k] == false)){ newRowNumber = x - k; } if(dynaProgram[newRowNumber][columnNumber] &lt; minimum){ minimum = dynaProgram[newRowNumber][columnNumber]; } } </code></pre> <p>For some reason the <code>if(primeArray[i] == true</code> runs correctly, but I'm getting index out of bounds exception on <code>if(primeArray[k] == false</code>. The only difference between these two is the use of the variable k over i in the for loop.(the for loops are identical) I haven't used either variables anywhere else in my code. I have no idea why this occurs for one but not the other. In both cases, x remains the same number.</p> <p>I am also getting an index out of bounds exception on the second <code>minimum = dynaProgram[newRowNumber][columnNumber]</code>, while the first doesn't encounter an error. I know it's probably a stupid error, but I can't figure it out. If I change the 'k' for loop to <code>k &lt; x</code> the index of out bounds exception in the <code>if(primeArray[k] == false</code> line goes away, but then it isn't correct. (The error on the second <code>minimum = dynaProgram[newRowNumber][columnNumber]</code> doesn't go away however.)</p> <p>All this code is in a nested for loop which iterates through the rows and columns in the table to fill them in. If I remove the above code and just put <code>dynaProgram[rowNumber][columnNumber] = 1</code> I don't have an issue, so I don't believe that is the problem.</p>
 

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