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  1. #include <cstdlib>
  2. #include <string>
  3. #include <vector>
  4.  
  5. unsigned char parse_hex(char c)
  6. {
  7.     if ('0' <= c && c <= '9') return c - '0';
  8.     if ('A' <= c && c <= 'F') return c - 'A' + 10;
  9.     if ('a' <= c && c <= 'f') return c - 'a' + 10;
  10.     std::abort();
  11. }
  12.  
  13. std::vector<unsigned char> parse_string(const std::string & s)
  14. {
  15.     if (s.size() % 2 != 0) std::abort();
  16.     std::vector<unsigned char> result(s.size() / 2);
  17.  
  18.     for (std::size_t i = 0; i != s.size() / 2; ++i)
  19.         result[i] = 16 * parse_hex(s[2 * i]) + parse_hex(s[2 * i + 1]);
  20.  
  21.     return result;
  22. }
  23.  
  24. #include <iomanip>
  25. #include <iostream>
  26.  
  27. int main()
  28. {
  29. 	for (std::string line; std::getline(std::cin, line); )
  30. 	{
  31. 		for (unsigned int n : parse_string(line))
  32. 			std::cout << std::hex << n << " ";
  33. 		std::cout << "\n";
  34. 	}
  35. }
Success #stdin #stdout 0s 3464KB
comments (?)
stdin 
33ee
deadbeef
stdout 
33 ee 
de ad be ef
https://ideone.com/mbqLVJ
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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