View Compilation Error

0_0_24287784_27796.cpp: In function 'void change_root(int)':
0_0_24287784_27796.cpp:73:6: error: expected unqualified-id before 'or' token
  int or = root, nr = r;
      ^
0_0_24287784_27796.cpp:76:8: error: 'nr' was not declared in this scope
  nodes[nr].fat = 0;
        ^
0_0_24287784_27796.cpp:98:15: error: expected primary-expression before 'or' token
  for (int i = or ; i != nr; i = nodes[i].fat)
               ^
0_0_24287784_27796.cpp:98:18: error: expected primary-expression before ';' token
  for (int i = or ; i != nr; i = nodes[i].fat)
                  ^