Compilare: user.cpp: In function ‘int printHowMany(std::string, int, Trie*)’: user.cpp:60:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(index == word.size()-1) ^ user.cpp: In function ‘int main()’: user.cpp:123:16: warning: unused variable ‘i’ [-Wunused-variable] int which, i; ^ user.cpp: In function ‘int printHowMany(std::string, int, Trie*)’: user.cpp:64:1: warning: control reaches end of non-void function [-Wreturn-type] } ^