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    <p>A good way to go about this would be to use <code>std::transform</code>. Consult this <a href="http://www.cplusplus.com/reference/algorithm/transform/" rel="nofollow">link</a> for more details. Short example with how to do this for rows is below. The column part is a little tricky.</p> <hr> <pre><code>#include &lt;iostream&gt; #include &lt;vector&gt; #include &lt;algorithm&gt; using namespace std; const int nRowCnt = 3, nColCnt = 3; int RowFunc(int i) { return ++i; } int ColFunc(int i) { return --i; } void PrintArray(vector&lt;vector&lt;int&gt;&gt;&amp; vecArray, int nRowCnt, int nColCnt) { for (int nOuter = 0; nOuter &lt; nRowCnt; nOuter++) { for (int nInner = 0; nInner &lt; nColCnt; nInner++) { cout&lt;&lt;vecArray[nOuter][nInner]&lt;&lt;" "; } cout&lt;&lt;endl; } } int main() { vector&lt; vector&lt;int&gt; &gt; vecVals(nRowCnt, vector&lt;int&gt;(nColCnt,0)); vector&lt; int &gt; rowOut(nColCnt*nRowCnt,0), colOut(nColCnt*nRowCnt,0); vector&lt;int&gt;::iterator itrOut; for (int nRow = 0; nRow &lt; nRowCnt; nRow++) { for (int nCol = 0; nCol &lt; nColCnt; nCol++) { vecVals[nRow][nCol] = nRow * (10+nCol) ; } } PrintArray(vecVals,nRowCnt,nColCnt); itrOut = rowOut.begin(); for (int nOuter = 0; nOuter &lt; nRowCnt; nOuter++) { std::transform(vecVals[nOuter].begin(),vecVals[nOuter].end(),itrOut,RowFunc); itrOut += nColCnt; } itrOut = colOut.begin(); for (int nOuter = 0; nOuter &lt; nRowCnt; nOuter++) { for (int nInner = 0; nInner &lt; nColCnt; nInner++) { std::transform( vecVals[nInner].begin() + nOuter, vecVals[nInner].begin() + nOuter +1, itrOut,ColFunc); itrOut++; } } cout&lt;&lt;endl&lt;&lt;"Row Transformed"&lt;&lt;endl; for (itrOut = rowOut.begin(); itrOut != rowOut.end(); itrOut++) cout&lt;&lt;*itrOut&lt;&lt;" "; cout&lt;&lt;endl&lt;&lt;"Col Transformed"&lt;&lt;endl; for (itrOut = colOut.begin(); itrOut != colOut.end(); itrOut++) cout&lt;&lt;*itrOut&lt;&lt;" "; cout&lt;&lt;endl; return 0; } </code></pre> <hr> <p>There is a catch though, the column part won't work for non-square 2D arrays (i.e for it to work row and column counts must be the same). I guess this can be worked around with a little more thought.</p>
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