Compilare: user.cpp: In function ‘int Cauta()’: user.cpp:32:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k = 0; k < aux.size(); k++) ^ user.cpp:36:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (k == aux.size()) return j; ^ user.cpp: In function ‘int main()’: user.cpp:64:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < strlen(C);) ^