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    <pre><code>#include &lt;iostream&gt; #include &lt;string&gt; #include &lt;vector&gt; #include &lt;map&gt; using namespace std; string most_occurred(vector&lt;string&gt; &amp;vec) { map&lt;string, unsigned long&gt; str_map1; std::string max_element = ""; int max_count = 0; typedef vector&lt;string&gt;::const_iterator iter; iter end = vec.end(); for (iter it = vec.begin(); it != end; ++it) { int count = ++str_map1[*it]; if(count == max_count) max_element = "no max found"; if(count &gt; max_count) { max_count = count; max_element = *it; } } return max_element; } int main() { std::string arr1[5] = {"aa" , "bb", "cc", "dd", "ee"}; // no max found std::string arr2[5] = {"aa" , "aa", "cc", "dd", "ee"};// aa std::string arr3[5] = {"aa" , "aa", "cc", "cc", "ee"}; // no max found std::vector&lt;std::string&gt; input1(arr1, arr1+5); std::vector&lt;std::string&gt; input2(arr2, arr2+5); std::vector&lt;std::string&gt; input3(arr3, arr3+5); std::cout &lt;&lt; most_occurred(input1) &lt;&lt; std::endl; std::cout &lt;&lt; most_occurred(input2) &lt;&lt; std::endl; std::cout &lt;&lt; most_occurred(input3) &lt;&lt; std::endl; } </code></pre> <p>the result is:</p> <pre><code>no max found aa no max found </code></pre> <hr> <p>The following test resulted in <code>no max found</code>.</p> <pre><code>int main() { std::string arr1[24] = {"Element1", "Element2", "Element33", "1", "Element1", "Element2", "Element33", "2", "Element11", "Element2", "Element33", "2", "Element11" "Element21" "Element31", "2", "Element11", "Element21", "Element31", "1", "Element12", "Element21", "Element31", "1"}; // no max found std::vector&lt;std::string&gt; input1(arr1, arr1+24); std::cout &lt;&lt; most_occurred(input1) &lt;&lt; std::endl; } </code></pre> <p>If the above code returns std::string("") then there was no max element, else it will return the max.</p>
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    1. COI've been playing withe the answer you gave me for last few minutes. It doesn't enter if(count == max_count) max_element = ""; part. It still finds most frequent element. My test data file looks like: Element1 Element2 Element33 1 Element1 Element2 Element33 2 Element11 Element2 Element33 2 Element11 Element21 Element31 2 Element11 Element21 Element31 1 Element12 Element21 Element31 1
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    2. CO@user2336450 I tested the code above and it worked as I would expect it to.
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    3. CO@user2336450 I just tested your input and I got that no results max was found. Are you sure your parsing the file correctly?
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