View Compilation Error

0_0_30133665_19387.cpp: In function 'int main()':
0_0_30133665_19387.cpp:8:5: error: 'cin' was not declared in this scope
     cin>>n;
     ^
0_0_30133665_19387.cpp:13:8: error: 'cout' is not a member of 'std'
        std::cout<<std::hex<<i<<std::endl;
        ^
0_0_30133665_19387.cpp:13:19: error: 'hex' is not a member of 'std'
        std::cout<<std::hex<<i<<std::endl;
                   ^
0_0_30133665_19387.cpp:13:32: error: 'endl' is not a member of 'std'
        std::cout<<std::hex<<i<<std::endl;
                                ^