View Compilation Error

0_0_31094141_13211.cpp: In function 'int main()':
0_0_31094141_13211.cpp:8:21: error: 'endl' was not declared in this scope
 std::cout << a+b << endl;
                     ^
0_0_31094141_13211.cpp:8:21: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_31094141_13211.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:564:5: note:   'std::endl'
     endl(basic_ostream<_CharT, _Traits>& __os)
     ^