std::bitset::set

(1) all bits

Sets (to one) all bits in the bitset.

(2) single bit

Sets val as the value for the bit at position pos.

Parameters

pos

Order position of the bit whose value is modified.
Order positions are counted from the rightmost bit, which is order position 0.
If pos is equal or greater than the bitset size, an out_of_range exception is thrown.
size_t is an unsigned integral type.

val

Value to store in the bit (either true for one or false for zero).

Return value

Example

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// bitset::set
#include <iostream>       // std::cout
#include <bitset>         // std::bitset

int main ()
{
  std::bitset<4> foo;

  std::cout << foo.set() << '\n';       // 1111
  std::cout << foo.set(2,0) << '\n';    // 1011
  std::cout << foo.set(2) << '\n';      // 1111

  return 0;
}

1111
1011
1111

Data races

Exception safety

See also

bitset::reset

Reset bits (public member function)

bitset::flip

Flip bits (public member function)