View Compilation Error

0_0_32109975_10874.cpp: In function 'bool judge(std::string)':
0_0_32109975_10874.cpp:55:15: error: 'root' was not declared in this scope
     Node *p = root;
               ^
0_0_32109975_10874.cpp:63:28: error: invalid conversion from 'int' to 'Node*' [-fpermissive]
          p=p->next[s[i]-'a'];
                            ^