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  1. #include <iterator>
  2. #include <climits>
  3. #include <iostream>
  4.  
  5. //this version of gcc doesn't seem to have begin/end so I add them here
  6. namespace std {
  7. template< class T, size_t N > 
  8. T* begin( T (&array)[N] ) {return array;}
  9. template< class T, size_t N > 
  10. T* end( T (&array)[N] ) {return array+N;}
  11. }
  12. //you shouldn't have to do this
  13.  
  14.     template<class output_iterator>
  15.     void convert_number_to_array_of_digits(const unsigned number, 
  16.              output_iterator first, output_iterator last) 
  17.     {
  18.         const unsigned number_bits = CHAR_BIT*sizeof(int);
  19.         //extract bits one at a time
  20.         for(unsigned i=0; i<number_bits && first!=last; ++i) {
  21.             const unsigned shift_amount = number_bits-i-1;
  22.             const unsigned this_bit = (number>>shift_amount)&1;
  23.             *first = this_bit;
  24.             ++first;
  25.         }
  26.         //pad the rest with zeros
  27.         while(first != last) {
  28.             *first = 0;
  29.             ++first;
  30.         }
  31.     }
  32.  
  33.     int main() {
  34.         int number = 413523152;
  35.         int array[32];
  36.         convert_number_to_array_of_digits(number, std::begin(array), std::end(array));
  37.         for(int i=0; i<32; ++i)
  38.             std::cout << array[i] << ' ';
  39.     }
Success #stdin #stdout 0s 2928KB
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stdin
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Standard input is empty
stdout
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0 0 0 1 1 0 0 0 1 0 1 0 0 1 0 1 1 1 0 1 1 1 0 0 1 1 0 1 0 0 0 0
https://ideone.com/4lThkp
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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