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  1. #include <iostream>
  2. #include <limits>
  3.  
  4. unsigned int ReverseBits(unsigned int input)
  5. {
  6.     unsigned int output = input;
  7.     for (int i = sizeof(input) * 8 - 1; i; --i)
  8.     {
  9.         output <<= 1;
  10.         input >>= 1;
  11.         output |= input & 1;
  12.     }
  13.     return output;
  14. }
  15.  
  16. struct Bits
  17. {
  18.     unsigned bits;
  19.     Bits(unsigned value) : bits(value) {}
  20. };
  21.  
  22. std::ostream& operator<<(std::ostream& os, const Bits& b)
  23. {
  24.     unsigned mask = 1 << (std::numeric_limits<unsigned>::digits - 1);
  25.  
  26.     while (mask)
  27.     {
  28.         os << ((b.bits & mask) != 0);
  29.         mask >>= 1;
  30.     }
  31.  
  32.     return os;
  33. }
  34.  
  35. int main()
  36. {
  37.     unsigned num = 0xFFF0F0FF;
  38.  
  39.     std::cout << Bits(num) << '\n';
  40.     std::cout << Bits(ReverseBits(num)) << '\n';
  41. }
Success #stdin #stdout 0s 3340KB
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stdin
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Standard input is empty
stdout
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11111111111100001111000011111111
11111111000011110000111111111111
https://ideone.com/GeNIRR
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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