### 9.1 Construction of Bit Strings

procedure: make-bit-string k initialization ¶

  Returns a newly allocated bit string of length k. If initialization is `#f`, the bit string is filled with 0 bits; otherwise, the bit string is filled with 1 bits.

      (make-bit-string 7 #f)                  ⇒  #*0000000

procedure: bit-string-allocate k ¶

  Returns a newly allocated bit string of length k, but does not initialize it.

procedure: bit-string-copy bit-string ¶

  Returns a newly allocated copy of bit-string.