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  1. #include <iostream>
  2. #include <fstream>
  3. #include <iterator>
  4. #include <cctype>
  5.  
  6.  
  7. int main() {
  8.    std::size_t const cyphersCount = '9' - '0' + 1;
  9.    bool cyphers[cyphersCount] = {false};
  10.  
  11.    std::size_t const lettersCount = 'z' - 'a' + 1;
  12.    bool letters[lettersCount] = {false};
  13.  
  14.    // std::ifstream istream("filename");
  15.    std::istream & istream = std::cin;
  16.    for (std::istream_iterator<char> it(istream), end; it != end; ++it) {
  17.       if (std::isdigit(*it)) {
  18.          cyphers[*it - '0'] = true;
  19.       } else if (std::isalpha(*it)) {
  20.          letters[std::tolower(*it) - 'a'] = true;
  21.       }
  22.    }
  23.  
  24.    for (std::size_t i = 0; i != cyphersCount; ++i) {
  25.       if (!cyphers[i]) {
  26.          std::cout << static_cast<char>(i + '0');
  27.       }
  28.    }
  29.    for (std::size_t i = 0; i != lettersCount; ++i) {
  30.       if (!letters[i]) {
  31.          std::cout << static_cast<char>(i + 'a');
  32.       }
  33.    }
  34.    std::cout << std::endl;
  35. }
Success #stdin #stdout 0s 3344KB
comments (?)
stdin
copy 
ddfjgn 239u jdfgjjergnerie449
stdout
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015678abchklmopqstvwxyz
https://ideone.com/E31sFx
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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