View Compilation Error

0_0_31321316_12754.cpp: In function 'int main()':
0_0_31321316_12754.cpp:67:40: error: 'endl' was not declared in this scope
         std::cout<<"Case "<<ca++<<":"<<endl;
                                        ^
0_0_31321316_12754.cpp:67:40: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:39:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_31321316_12754.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:564:5: note:   'std::endl'
     endl(basic_ostream<_CharT, _Traits>& __os)
     ^