Hello, I am learning the basics of regular expression syntax and have been looking at the following example:<div><div>#include &lt;iostream&gt;</div><div>#include &lt;fstream&gt;</div><div>#include &lt;string&gt;</div><div>
#include &lt;boost/regex.hpp&gt;</div><div>#include &lt;boost/xpressive/xpressive.hpp&gt;</div><div><br></div><div>using namespace boost::xpressive;</div><div><br></div><div>int main()</div><div>{</div><div>  std::ifstream input(&quot;myfile&quot;);</div>
<div>  if(input)</div><div>    std::cout &lt;&lt; &quot;Success\n&quot;;</div><div>  else</div><div>    std::cout &lt;&lt; &quot;fail\n&quot;;</div><div><br></div><div>  std::string line;</div><div>  std::string data;</div>
<div>  </div><div>while (getline(input, line))</div><div>{</div><div>   data += line; </div><div>} </div><div><br></div><div>std::string const &amp;ref = data;</div><div>mark_tag day(1), month(2), year(3), delim(4);</div>
<div>sregex date = (month= repeat&lt;1,2&gt;(_d))  // find the month ...</div><div>               &gt;&gt; (delim= (set= &#39;/&#39;,&#39;-&#39;))            // followed by a delimiter ...</div><div>               &gt;&gt; (day=   repeat&lt;1,2&gt;(_d)) &gt;&gt; delim  // and a day followed by the same </div>
<div>               &gt;&gt; (year=  repeat&lt;1,2&gt;(_d &gt;&gt; _d));    // and the year.</div><div>smatch what;</div><div><br></div><div>    if( regex_search(ref, what, date ) )</div><div>    {</div><div>        std::cout &lt;&lt; what[0]     &lt;&lt; &#39;\n&#39;; // whole match</div>
<div>        std::cout &lt;&lt; what[day]   &lt;&lt; &#39;\n&#39;; // the day</div><div>        std::cout &lt;&lt; what[month] &lt;&lt; &#39;\n&#39;; // the month</div><div>        std::cout &lt;&lt; what[year]  &lt;&lt; &#39;\n&#39;; // the year</div>
<div>        std::cout &lt;&lt; what[delim] &lt;&lt; &#39;\n&#39;; // the delimiter</div><div>    }</div><div>return 0;</div><div>}</div></div><div><br></div><div>My problem is very simple and I am sorry to be asking about it. I want to include some literal wording in my regular expression. For example, before the program outputs the date it also searches for the words &quot;Football results for&quot; - (then date is output). Please can you show me how to prefix this regular expression with the literal words? My compiler see the &#39;for&#39; as a c++ keyword, without more.</div>
<div>Kind Regards</div>