View Compilation Error

0_0_36523962_25631.cpp: In function 'int main()':
0_0_36523962_25631.cpp:16:23: error: expected primary-expression before '.' token
         cout<<0<<endl;.//灯的初始状态是0，偶数次变换后是0，奇数次变换是1
                       ^
0_0_36523962_25631.cpp:17:9: error: expected unqualified-id before 'else'
         else
         ^