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  1. #include <array>
  2. #include <iostream>
  3.  
  4.  
  5. std::string to_hex(unsigned number)
  6. {
  7.     static const std::array<char, 16> hexdigits =
  8.         {'0', '1', '2', '3', '4', '5', '6', '7',
  9.          '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',};
  10.     std::string hex;
  11.     while (number != 0) {
  12.         hex.push_back(hexdigits[number % 16]);
  13.         number /= 16;
  14.     }
  15.     return {hex.rbegin(), hex.rend()};
  16. }
  17.  
  18.  
  19. int main()
  20. {
  21.     unsigned number;
  22.     std::cin >> number;
  23.     std::cout << to_hex(number) << std::endl;
  24. }
  25.  
Success #stdin #stdout 0s 3476KB
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E02
https://ideone.com/uEb3O4
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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