View Compilation Error

0_0_14903222_28810.cpp:4:17: error: 'fsd' is not a namespace-name
 using namespace fsd;
                 ^
0_0_14903222_28810.cpp:4:20: error: expected namespace-name before ';' token
 using namespace fsd;
                    ^
0_0_14903222_28810.cpp:5:18: error: '__gnu_cxx::crope' has not been declared
 using __gnu_cxx::crope;
                  ^