View Compilation Error

0_0_27686329_24359.cpp:8:23: error: 'data' does not name a type
  bool operator<(const data &a)const
                       ^
0_0_27686329_24359.cpp: In member function 'bool shuzu::operator<(const int&) const':
0_0_27686329_24359.cpp:10:14: error: request for member 'n' in 'a', which is of non-class type 'const int'
   return n>a.n;
              ^
0_0_27686329_24359.cpp: In function 'int main()':
0_0_27686329_24359.cpp:24:17: error: 'sort' was not declared in this scope
   sort(a+1,a+1+n);
                 ^
0_0_27686329_24359.cpp:24:17: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from 0_0_27686329_24359.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4705:5: note:   'std::sort'
     sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
     ^