foo.cc:10:1: error: 'vector' does not name a type; did you mean 'perror'?
 vector<int> v;
 ^~~~~~
 perror
foo.cc: In function 'int main()':
foo.cc:17:3: error: 'v' was not declared in this scope
   v.push_back(x);
   ^
foo.cc:19:7: error: 'v' was not declared in this scope
  sort(v.begin(), v.end());
       ^
foo.cc:22:17: error: unable to deduce 'auto&&' from 'v'
  for ( auto i : v ) printf("%d ", i);
                 ^
foo.cc:16:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int x; scanf("%d", &x);
          ~~~~~^~~~~~~~~~

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