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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. template<long long X>
  5. class Bitset
  6. {
  7. private:
  8.     std::vector<unsigned char> bits = std::vector<unsigned char> ((X+7)/8);
  9.  
  10. public:
  11.     /* constructors */
  12.  
  13.     class BitProxy
  14.     {
  15.     private:
  16.         unsigned char &bit;
  17.  
  18.     public:
  19.         BitProxy(unsigned char &bit) : bit(bit) {}
  20.  
  21.         BitProxy& operator=(unsigned char x) { bit = x; return *this; }
  22.         operator unsigned char() const { return bit; }
  23.     };
  24.  
  25.     BitProxy operator[](size_t index) { return BitProxy(bits[index]); }
  26.  
  27.     friend std::ostream& operator<< (std::ostream &output, const BitProxy &x)
  28. 	{
  29.     	output << static_cast<short>(static_cast<unsigned char>(x));
  30. 	    return output;
  31. 	}
  32. };
  33.  
  34. int main()
  35. {
  36. 	Bitset<1> a;
  37. 	a[0] = 0xff;
  38. 	std::cout << a[0] << std::endl;
  39. 	std::cout << 'a' << std::endl;
  40. 	return 0;
  41. }
Success #stdin #stdout 0s 4460KB
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255
a
https://ideone.com/4xWwdU
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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