src.cpp: In function 'int main()':
src.cpp:11:12: error: 'sort' was not declared in this scope
sort(a,a 4);
^
src.cpp:11:12: note: suggested alternative:
In file included from E:/OpenJudger2-backup/Compilers/mingw/lib/gcc/mingw32/5.1.0/include/c /algorithm:62:0,
from src.cpp:2:
E:/OpenJudger2-backup/Compilers/mingw/lib/gcc/mingw32/5.1.0/include/c /bits/stl_algo.h:4718:5: note: 'std::sort'
sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
^