套件：libbitarray-dev（2.0-2） [debports]
library for bit arrays
Bit arrays are arrays of bits (values zero or one). This is a convenient and efficient implementation for C/C++. Arrays can be enlarged or shrunk as needed.
Bit arrays are initialised to zero when created or extended. All operations have their bounds checked - an "Out of bounds" error is printed if you try to access a bit with index >= length. Arrays of length 0 are permitted. Indices must be >= 0.