title: Reading first column data file as string
body: <p>I have a dat file like this</p>
  
  <pre><code>AAAA     1861    9   7   0.00    -1.50   -19.50      9999.00     9999.00     9999.00     9999.00     18.20   9999.00     6.70    135.00      8.00    9999.00     9999.00     9999.00     9999    0   193        250180280600000000 
  BBBBBBBBB    1861    9   7   0.00    -7.50   36.50   9999.00     9999.00     21.40   1018.10     22.60   9999.00     1.00    68.00   2.00    9999.00     9999.00     9999.00     9999    0   193        451720280600000000 
  VVVVVVVVV    1861    9   7   0.00    -58.50      10.50   9999.00     9999.00     27.50   9999.00     26.90   9999.00     15.40   45.00   6.00    9999.00     9999.00     9999.00     9999    0   193        357610280600000000 
  SSSSSSSS     1861    9   7   0.00    117.50      13.50   9999.00     9999.00     28.00   1010.30     28.00   9999.00     4.60    158.00      5.00    9999.00     9999.00     9999.00     9999    0   193        370170280600000000 
  DD   1861    9   7   1.00    -19.50      6.50    9999.00     9999.00     24.70   1014.80     25.30   9999.00     6.70    203.00      2.00    9999.00     9999.00     9999.00     9999    0   193        343600280600000000 
  E    1861    9   7   1.00    44.50   -28.50      9999.00     9999.00     20.40   9999.00     19.00   9999.00     2.60    135.00      2.00    9999.00     9999.00     9999.00     9999    0   193        218240280600000000 
  ZZZZZZZZZZZZ     1861    9   7   1.00    -15.50      38.50   9999.00     9999.00     22.00   9999.00     21.90   9999.00     6.70    68.00   2.00    9999.00     9999.00     9999.00     9999    0   193        458840280600000000 
  </code></pre>
  
  <p>and I would like to store the first column of the file in a vector of strings. Any idea?</p>
  
  <p>This is what I tried</p>
  
  <pre><code>for(int k=0;k&lt;ROW;k++){
     INNA &gt;&gt; ID;                      
     for(int j=1;j&lt;=COL;j++) INNA &gt;&gt; discardID; 
     IDname[k]= ID;
  } 
  </code></pre>
  
  <p>but in ID I then have all the columns as a unique string..</p>
  
  <p>Many thanks</p>