std::bitset::count

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C++ Standard Library
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Utilities library
Type support (basic types, RTTI, type traits) Dynamic memory management Error handling Program utilities Compile-time rational arithmetic (C++11) Date and time Function objects initializer_list (C++11) bitset hash (C++11) Relational operators rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>= Pairs and tuples pair tuple (C++11) piecewise_construct_t (C++11) piecewise_construct (C++11) Swap, forward and move swap forward (C++11) move (C++11) move_if_noexcept (C++11) declval (C++11)
std::bitset
Member functions bitset::bitset bitset::operator= bitset::operator== bitset::operator!= Element access bitset::operator[] bitset::test bitset::all bitset::any bitset::none bitset::count Capacity bitset::size Modifiers bitset::operator&= bitset::operator|= bitset::operator^= bitset::operator~ bitset::operator<<= bitset::operator>>= bitset::operator<< bitset::operator>> bitset::set bitset::reset bitset::flip Conversions bitset::to_string bitset::to_ulong bitset::to_ullong (C++11)

size_t count() const;

Returns the number of bits that are set to true.

[edit] Parameters

(none)

[edit] Return value

number of bits that are set to true.

[edit] See also

size	returns the size number of bits that the bitset can hold (public member function)