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operator>> (<bitset>)

Reads a string of bit characters into a bitset.

template<class CharType, class Traits, size_t Bits> 
   basic_istream<CharType, Traits>& operator>> ( 
      basic_istream<CharType, Traits>& _Istr,
      bitset<N>& _Right 
   );

_Istr

The string that is entered into the input stream to be inserted into the bitset.

_Right

The bitset that is receiving the bits from the input stream.

The template function returns the string _Istr.

The template function overloads operator>> to store in the bitset _Right the value bitset(str), where str is an object of type basic_string<CharType, Traits, allocator<CharType> >& extracted from _Istr.

The template function extracts elements from _Istr and inserts them into the bitset until:

  • All the bit elements have been extracted from the input stream and stored in the bitset.

  • The bitset is filled up with bits from the input stream.

  • An input element is encountered that is neither 0 nor 1.

#include <bitset>
#include <iostream>
#include <string>

using namespace std;
int main()
{

   bitset<5> b1;
   cout << "Enter string of (0 or 1) bits for input into bitset<5>.\n"
        << "Try bit string of length less than or equal to 5,\n"
        << " (for example: 10110): ";
   cin >>  b1;

   cout << "The ordered set of bits entered from the "
        << "keyboard\n has been input into bitset<5> b1 as: ( "
        << b1 << " )" << endl;

   // Truncation due to longer string of bits than length of bitset
   bitset<2> b3;
   cout << "Enter string of bits (0 or 1) for input into bitset<2>.\n"
        << " Try bit string of length greater than 2,\n"
        << " (for example: 1011): ";
   cin >>  b3;

   cout << "The ordered set of bits entered from the "
        << "keyboard\n has been input into bitset<2> b3 as: ( "
        << b3 << " )" << endl;

   // Flushing the input stream
   char buf[100];
   cin.getline(&buf[0], 99);

   // Truncation with non-bit value
   bitset<5> b2;
   cout << "Enter a string for input into  bitset<5>.\n"
        << " that contains a character than is NOT a 0 or a 1,\n "
        << " (for example: 10k01): ";
   cin >>  b2;

   cout << "The string entered from the keyboard\n"
        << " has been input into bitset<5> b2 as: ( "
        << b2 << " )" << endl;
}

10110
1011
10k10

Header: <bitset>

Namespace: std

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