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  1. #include <iostream>                /* C++ iostream            C++98/11 */
  2. #include <string>                  /* C++ strings             C++98/11 */                   /* RegEx                   Boost  */
  3. #include <boost/algorithm/string.hpp>
  4. int main() {
  5. 	std::string str = "\\dir\\dir2\\dir4\\dir4\\dir6";
  6. auto itr = boost::find_nth(str, "\\", 4);
  7. if(itr.empty()) std::cout << "empty";
  8. else std::cout << itr.begin() - str.begin();
  9.  
  10.  
  11. }
  12.  
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/ys6owe
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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