Compilare: user.cpp: In function ‘int main()’: user.cpp:49:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(s);++i) ~^~~~~~~~~~ user.cpp: In function ‘int calculHash(int)’: user.cpp:29:5: warning: control reaches end of non-void function [-Wreturn-type] } ^