/in/foo.cc: In function 'int main()':
/in/foo.cc:14:21: error: expected primary-expression before ']' token
  sort(a[0],sizeof(a[]))
                     ^
/in/foo.cc:15:17: error: 'j' was not declared in this scope
     for(int j=0;j<n;j++)
                 ^
/in/foo.cc:18:2: error: 'i' was not declared in this scope
  i=0;
  ^