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  1. 	#include <iostream>
  2. 	#include <bitset>
  3.  
  4. 	using namespace std;
  5.  
  6. 	template<std::size_t num_bits>
  7. 	void writeBits(ostream& os, const std::bitset<num_bits>& thebits)
  8. 	{
  9. 		for(std::size_t bit_pos = 0; bit_pos < num_bits;)
  10. 		{
  11. 			unsigned char currentByte = 0;
  12. 			for(int currentBit = 0; currentBit < sizeof(unsigned char) && bit_pos < num_bits; ++currentBit, ++bit_pos)
  13. 			{
  14. 				currentByte |= thebits[bit_pos] ? (0x80 >> currentBit) : 0;
  15. 			}
  16. 			os << currentByte;
  17. 		}
  18. 	}
  19.  
  20. 	int main() {
  21. 		std::bitset<4> nibble(std::string("1100"));
  22. 		std::bitset<8> byte(std::string("11001010"));
  23. 		std::bitset<23> number_of_bits(std::string("10101010101010101010101"));
  24.  
  25. 		writeBits(std::cout,nibble);
  26. 		writeBits(std::cout,byte);
  27. 		writeBits(std::cout,number_of_bits);
  28.  
  29. 		return 0;
  30. 	}
Success #stdin #stdout 0s 3428KB
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https://ideone.com/Jc2IIY
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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