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    <p>Use regex from the standard library.</p> <pre><code>#include &lt;regex&gt; using namespace std::tr1; </code></pre> <p>I haven't played with C++ in many years, but it would be something like this (assuming you stored your string in the variable 'str'):</p> <pre><code>std::tr1::regex rx("[0-9]..-..-"); std::string replacement = "***-**-"; std::string str2 = std::tr1::regex_search(str, rx, replacement); </code></pre> <p>The above code was referenced from <a href="http://www.johndcook.com/cpp_regex.html" rel="nofollow noreferrer">this site</a>, and you can test your regular expressions with this <a href="http://rubular.com/" rel="nofollow noreferrer">fantastic tool</a>. I am fairly certain that you want regex_search as opposed to regex_replace due to the slightly different way that C++ handles matches, but again, I haven't used C++ in some time, so I can't say for sure.</p> <p>Note that "[0-9]..-..-" is a regex that will match any numeric character followed by two characters of any type (. is a wildcard), then a -, then two more characters of any type, then another -. Thus, in your text, it will only match the first two segments of the two SSNs. You are then replacing the numbers in that matched pattern with asterisks.</p> <p>Also, being as this is homework, I'd like to give you some additional resources, with the first being language-specific:</p> <p><a href="http://softwareramblings.com/2008/07/regular-expressions-in-c.html" rel="nofollow noreferrer">http://softwareramblings.com/2008/07/regular-expressions-in-c.html</a></p> <p><a href="http://www.regular-expressions.info/reference.html" rel="nofollow noreferrer">http://www.regular-expressions.info/reference.html</a></p> <p><a href="http://www.zytrax.com/tech/web/regex.htm" rel="nofollow noreferrer">http://www.zytrax.com/tech/web/regex.htm</a></p> <p>Also, in the future, you will probably get more useful answers if you follow the <a href="https://meta.stackexchange.com/questions/10811/how-to-ask-and-answer-homework-questions">community guidelines for asking homework questions.</a></p>
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    1. POHow would i manipulate an imported .text file to show only the last four numbers os an employee's SNN on the screen?
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    1. COThanks a lot im not sure where to place it though, say for example the string "line" is used to display the content of the file 'cout << line << endl' where does this manipulation take place. You have helped a lot and I will start posting in the correct place, Thank You.
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