View Compilation Error

0_0_25453497_5381.cpp:101:18: error: expected unqualified-id before 'int'
       int lowbit(int x) { return x & (-x);}
                  ^
0_0_25453497_5381.cpp:18:20: note: in definition of macro 'lowbit'
 #define lowbit(x) (x&-x)
                    ^
0_0_25453497_5381.cpp:101:18: error: expected ')' before 'int'
       int lowbit(int x) { return x & (-x);}
                  ^
0_0_25453497_5381.cpp:18:20: note: in definition of macro 'lowbit'
 #define lowbit(x) (x&-x)
                    ^