Hi, I'm playing around with the boost::regex library and I want to match two tokens from a filename. For example files with the following format: myname_123.dat I want to be able to determine the string and number separated by the underscore. So the result of my match should be "myname", and 123. In python, I can do it like this: import re
x = 'myclass_123.dat' result = re.match(r'(\w+)_(\d+)\.dat$', x) result.group(1) 'myclass' result.group(2) '123'
I'm having problems getting the same result in C++.
This is the sample program:
int main(int argc, const char** argv)
{
boost::regex expression("(\\w+)_(\\d+)\\.dat$");
std::string filename(argv[1]);
boost::cmatch what;
if(boost::regex_search(filename.c_str(), what,
expression))
{
for (int i=0;i openmp3 alexis_1023.dat
alexis_1023.dat
alexis_1023.dat _1023.dat
1023.dat .dat How do I get my groups "alexis", 123 as in Python?
Thanks,
Alexis
Programming Tutorial:
In Python: To do this, do this
In Perl: To do this, do this or this or this or this...
In C: To do this, do this, but be careful
In C++: To do this, do this, but don't do this, be careful of this, watch out for this, and whatever you do, don't do this
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