Compilare: main.cpp: In member function 'void Trie::query()': main.cpp:111:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int j = i + 1; j < k; ++j) ^~~ main.cpp:113:6: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return ; ^~~~~~ main.cpp: At global scope: main.cpp:123:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^ main.cpp: In member function 'int Trie::encode(char)': main.cpp:36:2: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In member function 'char Trie::decode(int)': main.cpp:48:2: warning: control reaches end of non-void function [-Wreturn-type] } ^