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POWord Solver - All Directions
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  1. POWord Solver - All Directions
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    copied!<p>I created a word solver for all directions. It finds words horizontally, vertically and reverse. However, I am having problems making it go all directions. So to take "hello" in:</p> <pre><code>H E i l x L p q c L O m </code></pre> <p>Anyone can point me on how to do that? Here is my algorithm to that searches for the words (in C++):</p> <pre><code>/* * For loops that search each row, each column in all 8 possible directions. */ void Scramble::solve() { cout &lt;&lt; "Output:" &lt;&lt; endl; for (int row = 0; row &lt; getRows(); row++) { for (int col = 0; col &lt; getCols(); col++) for (int rowDir = -1; rowDir &lt;= 1; rowDir++) for (int colDir = -1; colDir &lt;=1; colDir++) if (rowDir != 0 || colDir != 0) findWords(row, col, rowDir, colDir); } } /* * Finds the matches in a given direction. Also calls verifyWord() to verify that the * current sequence of letters could possibly form a word. If not, search stops. */ void Scramble::findWords(int startingRow, int startingCol, int rowDir, int colDir) { int searchResult; string sequence = ""; sequence = sequence + wordsArr[startingRow][startingCol]; for (int i = startingRow + rowDir, j = startingCol + colDir; i &gt;= 0 &amp;&amp; j &gt;= 0 &amp;&amp; i &lt; getRows() &amp;&amp; j &lt; getCols(); i = i + rowDir, j = j + colDir) { sequence = sequence + wordsArr[i][j]; if (sequence.length() &gt;= 3) { searchResult = verifyWord(words, sequence); if ((unsigned int)searchResult == words.size()) break; if (words[searchResult].rfind(sequence) &gt; words[searchResult].length()) break; if (words[searchResult] == (sequence)) cout &lt;&lt; sequence &lt;&lt; endl; } } } /* * Performs the verifyWord search method. * Searches the word to make sure that so far, there is possibly that the current sequence * of letter could form a word. That is to avoid continuing to search for a word * when the first sequence of characters do not construct a valid word in the dictionary. * * For example, if we have 'xzt', when this search is done it prevents the search * to continue since no word in the dictionary starts with 'xzt' */ int Scramble::verifyWord(vector&lt;string&gt; words, string str) { int low = 0; int mid = 0; int high = words.size(); while (low &lt; high) { mid = (low + high) / 2; if (str &gt; words[mid]) { low = mid + 1; } else if (str &lt; words[mid]) { high = mid - 1; } else return mid; } } </code></pre>
 

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