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  1.     #include <iostream>
  2.     #include <string>
  3.  
  4.     #include <regex.h>
  5.  
  6.     const int MAX_MATCHES(20);
  7.  
  8.     void elements(const std::string &input)
  9.     {
  10.         regex_t ElementRegEx;
  11.         regcomp(&ElementRegEx, "([0-9]+)", REG_EXTENDED);
  12.  
  13.         std::string Elements(input);
  14.  
  15.         regmatch_t ElementMatches[MAX_MATCHES];
  16.         while (!regexec(&ElementRegEx, Elements.c_str(), MAX_MATCHES, ElementMatches, 0))
  17.         {
  18.             const regmatch_t &Match = ElementMatches[0];
  19.  
  20.             if ((Match.rm_so != -1) && (Match.rm_eo != -1))
  21.             {
  22.                 const std::string CurrentElement(Elements.substr(Match.rm_so, Match.rm_eo - Match.rm_so));
  23.                 std::cout << '\t' << CurrentElement << '\n';
  24.  
  25.                 if (Elements.size() > static_cast<size_t>(Match.rm_eo))
  26.                 Elements = Elements.substr(Match.rm_eo);
  27.                 else
  28.                 Elements = "";
  29.             }
  30.         }
  31.     }
  32.  
  33.     void cycles(const std::string &input)
  34.     {
  35.         regex_t CycleRegEx;
  36.         regcomp(&CycleRegEx, "([0-9]+[ ]*,[ ]*)*[0-9]+", REG_EXTENDED);
  37.  
  38.         std::string Cycles(input);
  39.  
  40.         regmatch_t CycleMatches[MAX_MATCHES];
  41.         while (!regexec(&CycleRegEx, Cycles.c_str(), MAX_MATCHES, CycleMatches, 0))
  42.         {
  43.             const regmatch_t &Match = CycleMatches[0];
  44.  
  45.             if ((Match.rm_so != -1) && (Match.rm_eo != -1))
  46.             {
  47.                 const std::string CurrentCycle(Cycles.substr(Match.rm_so, Match.rm_eo - Match.rm_so));
  48.                 std::cout << CurrentCycle << '\n';
  49.                 elements(CurrentCycle);
  50.  
  51.                 if (Cycles.size() > static_cast<size_t>(Match.rm_eo))
  52.                 Cycles = Cycles.substr(Match.rm_eo + 1);
  53.                 else
  54.                 Cycles = "";
  55.             }
  56.         }
  57.  
  58.         regfree(&CycleRegEx);
  59.     }
  60.  
  61.     int main(int argc, char **argv)
  62.     {
  63.         std::string input("(1,2,5)(3,4)");
  64.  
  65.         std::cout << "input: " << input << "\n\n";
  66.  
  67.         cycles(input);
  68.         return 0;
  69.     }
Success #stdin #stdout 0.01s 2860KB
comments (?)
stdin 
Standard input is empty
stdout 
input: (1,2,5)(3,4)

1,2,5
	1
	2
	5
3,4
	3
	4
https://ideone.com/YlzH93
pruebas de regex
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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