View Compilation Error

0_0_16024756_2700.cpp: In function 'int main()':
0_0_16024756_2700.cpp:42:11: error: base operand of '->' has non-pointer type 'tNode'
       root->insert(str);
           ^
0_0_16024756_2700.cpp:44:22: error: base operand of '->' has non-pointer type 'tNode'
       std::cout<<root->find(str);
                      ^