Effects: Constructs an object of class bitset<N>, initializing all bits to zero.
constexpr bitset(unsigned long long val) noexcept;
Effects: Constructs an object of class bitset<N>, initializing the first M bit positions to the corresponding bit values in val. M is the smaller of N and the number of bits in the value representation ([basic.types]) of unsigned long long. If M < N, the remaining bit positions are initialized to zero.
template <class charT, class traits, class Allocator>
explicit
bitset(const basic_string<charT, traits, Allocator>& str,
typename basic_string<charT, traits, Allocator>::size_type pos = 0,
typename basic_string<charT, traits, Allocator>::size_type n =
basic_string<charT, traits, Allocator>::npos,
charT zero = charT('0'), charT one = charT('1'));
Requires: pos <= str.size().
Effects: Determines the effective length rlen of the initializing string as the smaller of n and str.size() - pos.
The function then throws invalid_argument if any of the rlen characters in str beginning at position pos is other than zero or one. The function uses traits::eq() to compare the character values.
Otherwise, the function constructs an object of class bitset<N>, initializing the first M bit positions to values determined from the corresponding characters in the string str. M is the smaller of N and rlen.
An element of the constructed string has value zero if the corresponding character in str, beginning at position pos, is 0 zero. Otherwise, the element has the value 1. Character position pos + M - 1 corresponds to bit position zero. Subsequent decreasing character positions correspond to increasing bit positions.
If M < N, remaining bit positions are initialized to zero.
template <class charT>
explicit bitset(
const charT* str,
typename basic_string<charT>::size_type n = basic_string<charT>::npos,
charT zero = charT('0'), charT one = charT('1'));
Effects: Constructs an object of class bitset<N> as if by
bitset(
n == basic_string<charT>::npos
? basic_string<charT>(str)
: basic_string<charT>(str, n),
0, n, zero, one)