Compilare: main.cpp: In function 'int main()': main.cpp:35:7: warning: unused variable 'x' [-Wunused-variable] char x; ^ main.cpp: In function 'void Add()': main.cpp:57:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if ( nod -> next[S[i] - 'a'] == nullptr ) ^~ main.cpp:59:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' nod = nod -> next[S[i] - 'a']; ^~~