运行 ID: 134226

Main.cc: In function ‘int main()’:
Main.cc:10:2: error: ‘sort’ was not declared in this scope
  sort(a+1,a+n+1);
  ^~~~
Main.cc:10:2: note: suggested alternative: ‘qsort’
  sort(a+1,a+n+1);
  ^~~~
  qsort