public member function
<bitset>

std::bitset::size

size_t size() const;
Return size
Returns the number of bits in the bitset.

Parameters

none

Return Value

The number of bits in the bitset. This is the template parameter N.

size_t is an unsigned integral type.

Example

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// bitset::size
#include <iostream>
#include <bitset>
using namespace std;

int main ()
{
  bitset<8> first;
  bitset<4> second;

  cout << "first.size() is " << (int) first.size() << endl;
  cout << "second.size() is " << (int) second.size() << endl;

  return 0;
}


Output:
first.size() is 8
second.size() is 4

See also

bitset::count
Count bits set (public member function)