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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4. #include <bitset>
  5. #include <iomanip>
  6.  
  7. using namespace std;
  8.  
  9. class MyBinary {
  10.   private:
  11.     static const unsigned _BIT_LEN = 1024;
  12.  
  13.     const int         _digits;
  14.     int               _len;
  15.     bitset<_BIT_LEN>  _acc;
  16.  
  17.   public:
  18.     MyBinary(int digits) : _digits(digits), _len(5), _acc(digits) {}
  19.  
  20.     void add(unsigned long val) {
  21.       _len += _digits;
  22.       _acc <<= _digits;
  23.  
  24.       for (int i(0); i<_digits; i++)
  25.         _acc.set(i, val & (1U << i));
  26.     }
  27.  
  28.     vector<string>  get_bit_strings(int offset) {
  29.       string src(_acc.to_string().substr(_BIT_LEN - _len));
  30.       vector<string> dst;
  31.  
  32.       for (int i(0); i<_len; i+=offset) {
  33.         if (i < _len-offset)
  34.           dst.push_back(src.substr(i, offset));
  35.         else {
  36.           string tmp(src.substr(i, offset - (_len - i)));
  37.           tmp.append(_len - i, '0');
  38.           dst.push_back(tmp);
  39.         }
  40.       }
  41.       return dst;
  42.     }   
  43. };
  44.  
  45. int main()
  46. {
  47.   MyBinary mb(6);
  48.  
  49.   mb.add(0);
  50.   mb.add(20);
  51.   mb.add(0);
  52.   mb.add(20);
  53.   vector<string> vs(mb.get_bit_strings(8));
  54.  
  55.   for (int i(0); i<vs.size(); i++)
  56.     cout << "0x" << std::hex << std::setw(2) << std::setfill('0') << bitset<8>(vs.at(i)).to_ulong() << endl;
  57.  
  58.   return 0;
  59. }
Success #stdin #stdout 0.01s 2860KB
comments (?)
stdin 
Standard input is empty
stdout 
0x30
0x0a
0x00
0xa0
https://ideone.com/LtgS7
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
secret

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