Set the bit at the specified pos of this bitset to 1 and return a reference to this modifiable bitset. Optionally specify val as the value to set the bit. If val is non-zero, the bit is set to 1, otherwise the bit is set to 0.
pos
val
Declared in <bslstl_bitset.h>
<bslstl_bitset.h>
bitset<N>& set( std::size_t pos, int val = true);