View Compilation Error

0_0_28209422_8734.cpp: In function 'int main()':
0_0_28209422_8734.cpp:9:17: error: incomplete type 'std::ios {aka std::basic_ios<char>}' used in nested name specifier
 #define closeio std::ios::sync_with_stdio(false)
                 ^
0_0_28209422_8734.cpp:13:9: note: in expansion of macro 'closeio'
         closeio;int t,i;cin>>t;while(t--) 
         ^
0_0_28209422_8734.cpp:13:25: error: 'cin' was not declared in this scope
         closeio;int t,i;cin>>t;while(t--) 
                         ^
0_0_28209422_8734.cpp:27:3: error: 'cout' was not declared in this scope
   cout<<l<<endl;
   ^
0_0_28209422_8734.cpp:27:12: error: 'endl' was not declared in this scope
   cout<<l<<endl;
            ^