title: How to merge the vector_elements of two .csv files in series in one csv file in c++?
body: <p>First file, file1.csv</p>
  
  <pre><code>4.00
  3.00
  3.00
  4.00
  </code></pre>
  
  <p>Second file, file2.csv</p>
  
  <pre><code>10.8
  12.4
  21.9
  17.5
  </code></pre>
  
  <p>I want my final file final.csv in the format</p>
  
  <pre><code>4.00 
  3.00 
  3.00 
  4.00 
  10.8
  12.4
  21.9
  17.5
  </code></pre>