Reference
C Library
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STL Containers
bitset
deque
list
map
multimap
multiset
priority_queue
queue
set
stack
vector
bitset
bitset::bitset
bitset operators
member functions:
bitset::any
bitset::count
bitset::flip
bitset::none
bitset::operator[]
bitset::reset
bitset::set
bitset::size
bitset::test
bitset::to_string
bitset::to_ulong


bitset::none

public member function
bool none ( ) const;

Test if no bit is set

Returns whether none of the bits in the bitset are set.

Parameters

none

Return value

true if none of the bits in the bitset are set, and false otherwise.

Example

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// bitset::none
#include <iostream>
#include <bitset>
using namespace std;
int main ()
{
  bitset<16> mybits;
  cout << "enter a binary number: ";
  cin >> mybits;
  if (mybits.none())
    cout << "mybits has no bits set.\n";
  else
    cout << "mybits has " << (int)mybits.count() << " bits set.\n";
  return 0;
}


See also

bitset::count Count bits set (public member function)
bitset::any Test if any bit is set (public member function)
bitset::test Return bit value (public member function)