Compilare: user.cpp: In function ‘void create_automaton(const string&, int*)’: user.cpp:9:9: warning: unused variable ‘i’ [-Wunused-variable] int i, k=0; ^ user.cpp:9:12: warning: unused variable ‘k’ [-Wunused-variable] int i, k=0; ^ user.cpp: In function ‘std::list<int> find_matches(const string&, const string&, int*)’: user.cpp:14:9: warning: unused variable ‘i’ [-Wunused-variable] int i, k=0; ^ user.cpp:14:12: warning: unused variable ‘k’ [-Wunused-variable] int i, k=0; ^ user.cpp: In function ‘int main()’: user.cpp:34:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<pattern.size(); i++){ ^ user.cpp:45:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<text.size(); i++){ ^ user.cpp:52:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==pattern.size()){ ^