View Compilation Error

0_0_18870978_15127.cpp:54:12: error: expected unqualified-id before 'const'
  void and (const Bitset & b)
            ^
0_0_18870978_15127.cpp:54:12: error: expected ')' before 'const'
0_0_18870978_15127.cpp:54:11: error: expected ';' at end of member declaration
  void and (const Bitset & b)
           ^
0_0_18870978_15127.cpp:54:27: error: expected ';' at end of member declaration
  void and (const Bitset & b)
                           ^
0_0_18870978_15127.cpp:54:28: error: expected unqualified-id before ')' token
  void and (const Bitset & b)
                            ^
0_0_18870978_15127.cpp:94:1: error: expected '}' at end of input
 }
 ^
0_0_18870978_15127.cpp:53:2: error: expected unqualified-id at end of input
  }
  ^