View Compilation Error

0_0_18726025_26418.cpp:2:6: error: expected nested-name-specifier before '&' token
 using namespace std;
      ^
0_0_18726025_26418.cpp:2:21: error: expected identifier before '&' token
 using namespace std;
                     ^
0_0_18726025_26418.cpp:2:26: error: expected constructor, destructor, or type conversion before ';' token
 using namespace std;
                          ^
0_0_18726025_26418.cpp:2:27: error: 'std' does not name a type
 using namespace std;
                           ^
0_0_18726025_26418.cpp:3:6: error: expected constructor, destructor, or type conversion before ';' token
  int main() 
      ^
0_0_18726025_26418.cpp:3:11: error: 'nbsp' declared as reference but not initialized
  int main() 
           ^
0_0_18726025_26418.cpp:3:23: error: expected constructor, destructor, or type conversion before 'nbsp'
  int main() 
                       ^
0_0_18726025_26418.cpp:4:1: error: expected unqualified-id before '{' token
 { 
 ^