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  1. #include <iostream>
  2. #include <sstream>
  3. #include <string>
  4.  
  5. using namespace std;
  6.  
  7.  
  8. char hextob(char ch)
  9. {
  10.     if (ch >= '0' && ch <= '9') return ch + '0';
  11.     if (ch >= 'A' && ch <= 'F') return ch - 10 + 'A';
  12.     if (ch >= 'a' && ch <= 'f') return ch - 10 + 'a';
  13.     return 0;
  14. }
  15. template<typename T>
  16. T hextot(char* hex)
  17. {
  18.     T value = 0;
  19.     for (size_t i = 0; i < sizeof(T)*2; ++i)
  20.         value |= hextob(hex[i]) << (8*sizeof(T)-4*(i+1));
  21.     return value;
  22. };
  23.  
  24. int main()
  25. {
  26.  
  27. char str[2] = {'3','6'};
  28.     std::cout << hextot<int16_t>(str)  << "\n";
  29.  
  30. }
  31.  
  32.  
Success #stdin #stdout 0.01s 5476KB
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Standard input is empty
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30208
https://ideone.com/3DSVgr
language:
C++ (gcc 8.3)
created:
330 days ago
visibility:
public

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