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  1. #include <iostream>
  2. #include <regex>
  3.  
  4. std::string exptract_phone_number(const std::string& input)
  5. {
  6.   const std::regex pattern(R"(^(8|\+?420)\s*\-?\s*(?:(\d{3})|\((\d{3})\))\s*\-?\s*(\d{7})$)");
  7.   std::smatch match;
  8.   return std::regex_match(input, match, pattern) ?
  9.     match[2].str() + match[3].str() + match[4].str() : "";
  10. }
  11.  
  12. int main()
  13. {
  14.   std::cout << exptract_phone_number("4207743822140") << std::endl;
  15.   std::cout << exptract_phone_number("+420-7743822140") << std::endl;
  16.   std::cout << exptract_phone_number("+420-(774)3822140") << std::endl;
  17.   std::cout << exptract_phone_number("+420774-3822140") << std::endl;
  18.   std::cout << exptract_phone_number("+420(774)-3822140") << std::endl;
  19.   std::cout << exptract_phone_number("+420-774-3822140") << std::endl;
  20.   std::cout << exptract_phone_number("+420-(774)-3822140") << std::endl;
  21.  
  22.   std::cout << exptract_phone_number("87743822140") << std::endl;
  23.   std::cout << exptract_phone_number("8-7743822140") << std::endl;
  24.   std::cout << exptract_phone_number("8-(774)3822140") << std::endl;
  25.   std::cout << exptract_phone_number("8774-3822140") << std::endl;
  26.   std::cout << exptract_phone_number("8(774)-3822140") << std::endl;
  27.   std::cout << exptract_phone_number("8-774-3822140") << std::endl;
  28.   std::cout << exptract_phone_number("8-(774)-3822140") << std::endl;
  29. }
Success #stdin #stdout 0.01s 4536KB
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stdin
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Standard input is empty
stdout
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7743822140
7743822140
7743822140
7743822140
7743822140
7743822140
7743822140
7743822140
7743822140
7743822140
7743822140
7743822140
7743822140
7743822140
https://ideone.com/69RjO3
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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