Using regular expressions with C++?

If you have a string of text:





string SampleText = "12345 quick 12345 brown 12345 fox";





and you wanted to use a regular expression to identify the words in the SampleText (a word is defined as a group of letters not separated by a space), what is the c++ code that would do it? What #include statements would I need?





Complete code would be helpful, but any help is appreciated.

Using regular expressions with C++?
If you are using unix:





you can use %26lt;regex.h%26gt;


Posix function are: regcomp, ergexec, and regerror.





you can type 'man regcomp' to get an explanation of how to use the functions.





If you are using Windows, here is some sample code:





// regex_parse.cpp


// compile with: /clr


#using %26lt;system.dll%26gt;





using namespace System;


using namespace System::Text::RegularExpressions;





int main( )


{


int words = 0;


String^ pattern = "[a-zA-Z]*";


Console::WriteLine( "pattern : '{0}'", pattern );


Regex^ regex = gcnew Regex( pattern );





String^ line = "one\ttwo three:four,five six seven";


Console::WriteLine( "text : '{0}'", line );


for( Match^ match = regex-%26gt;Match( line );


match-%26gt;Success; match = match-%26gt;NextMatch( ) )


{


if( match-%26gt;Value-%26gt;Length %26gt; 0 )


{


words++;


Console::WriteLine( "{0}", match-%26gt;Value );


}


}


Console::WriteLine( "Number of Words : {0}", words );





return 0;


}





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Note, the using namespace statement up top ends in: RegularExpressions;


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