I want a regeular expression to match a sequence. The sequence in which i

Question

0

Asked: May 30, 20262026-05-30T16:03:15+00:00 2026-05-30T16:03:15+00:00

I want a regeular expression to match a sequence. The sequence in which i

0

I want a regeular expression to match a sequence.
The sequence in which i want the regular expression to match is NP so to make sure all the way down the string that after the N there is a P and that before the P there is an N

1) NPNPNPNP = correct

2)NPNPPNP = incorrect

SORRY GUYS I MISSED ONE MORE PART FROM THE QUESTION THE 3RD MATCH WOULD BE

3)NNNPNPNNP = correct SO THERE CAN BE MANY N’s but at the end of the N there has to be a P to follow like above

But i do not think my regular expression is correct, can someone show me where i am going wrong?

std::string a ("NPNPNPPN");
 boost::regex const string_matcher("\(NP\)*");
 if(boost::regex_match(a,string_matcher))
 {
     DCS_LOG_DEBUG("Yes it Matches ");
 }
 else
 {
     DCS_LOG_DEBUG("No it does not Match");
 }