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  1. #include <iostream>
  2. #include <string>
  3. #include <regex>
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8.  
  9.     std::string line("A50. hsih Y0 his ");
  10.     std::smatch match;
  11.     std::regex reg("[A][-+]?([0-9]*\\.[0-9]+|[0-9]+\\.?)");   
  12.  
  13.     if ( std::regex_search(line,match,reg) ){
  14.             cout << match.str(0) << endl;
  15.  
  16.         }else{
  17.             cout << "nothing found" << endl;
  18.         }
  19.  
  20.   return 0;
  21. }
Success #stdin #stdout 0s 15336KB
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Standard input is empty
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A50.
https://ideone.com/pwGtZ1
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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